There’s something almost magical about watching a toddler twirl in a dress that took weeks to create—each tiny stitch a testament to patience, skill, and love. Hand-smocked dresses aren’t just clothing; they’re wearable art that carries whispers of tradition across generations. In 2026, parents and grandparents alike are rediscovering the profound value of investing in pieces that will outlast trends and be tucked away in hope chests rather than donation bins.
The resurgence of heirloom-quality children’s clothing reflects a deeper shift toward mindful consumption and meaningful keepsakes. Unlike mass-produced garments that fray and fade, a properly crafted hand-smocked dress becomes more precious with time, developing a legacy that connects great-grandmothers to newborns through shared craftsmanship. Whether you’re building a family collection or selecting that one perfect christening gown, understanding what transforms simple fabric into a treasured heirloom is essential.
Top 10 Hand-Smocked Dresses for Heirloom Keepsakes
Detailed Product Reviews
1. Petit Ami Baby Girls’ Hand-Embroidered Smocked Bubble (White, Newborn)
Overview: This heirloom-quality bubble outfit from Petit Ami delivers classic Southern charm for newborns up to three months. The white batiste fabric blend combines 65% polyester with 35% cotton, creating a lightweight, breathable garment perfect for warm weather christenings, portraits, or family gatherings. The set includes both the bubble suit and a coordinating hat, offering a complete look straight out of the box.
What Makes It Stand Out: The hand-embroidered smocking features intricate patterns accented with delicate pearl details, showcasing craftsmanship rarely found in modern baby clothing. The novelty smocking design elevates this beyond typical department store offerings. Snap closures between legs and button closures at the neck demonstrate thoughtful engineering for parents navigating diaper changes and dressing a wiggly newborn.
Value for Money: At $40.50, this piece sits firmly in the mid-range for heirloom baby apparel. While pricier than fast-fashion alternatives, the hand-embroidery and classic design justify the cost for special occasions. The machine-washable fabric ensures practicality that many delicate garments lack, potentially saving on dry cleaning expenses and extending usable life across multiple children.
Strengths and Weaknesses: Pros: Authentic hand-smocking details; breathable batiste fabric; practical snap closures; includes matching hat; machine washable; timeless design suitable for passing down. Cons: Polyester blend may not appeal to natural-fiber purists; white color shows stains easily; sizing limited to newborn; requires careful washing despite being machine-safe.
Bottom Line: An excellent choice for parents seeking traditional elegance without sacrificing practicality. The Petit Ami bubble offers authentic craftsmanship at a reasonable price point, making it ideal for christenings, portraits, or as a cherished keepsake gift.
2. Petit Ami Baby Girls’ Hand Embroidered Smocked Bubble Romper, 9 Months, Pink
Overview: Petit Ami’s pink bubble romper brings heirloom styling to older infants, sized specifically for nine-month-old babies. This 65% polyester, 35% cotton batiste ensemble maintains the brand’s signature lightweight comfort while introducing a soft pink hue perfect for spring celebrations, birthday portraits, or family events. The set includes both romper and hat, providing a coordinated look.
What Makes It Stand Out: The hand-smocked embroidery demonstrates genuine artisan technique, with each stitch creating a textured bodice that stretches to accommodate movement and growth. Unlike printed imitations, this authentic smocking maintains its dimension and beauty through multiple washes. The nine-month sizing specifically targets babies who’ve outgrown newborn attire but still deserve special occasion finery.
Value for Money: Priced at $36.80, this represents slightly better value than its newborn counterpart while maintaining identical quality standards. The machine-washable construction eliminates costly care requirements, and the durable fabric blend withstands the active movements of a crawling nine-month-old better than pure cotton alternatives. For families planning multiple children, the moderate price point makes passing down realistic.
Strengths and Weaknesses: Pros: Authentic hand-smocking; age-appropriate nine-month sizing; breathable batiste fabric; includes coordinating hat; practical machine wash care; stretch smocking accommodates growth; softer price point than newborn version. Cons: Polyester content may disappoint purists; pink limits versatility compared to white; no leg snaps mentioned (potential diaper change challenge); limited size range.
Bottom Line: A smart purchase for parents wanting traditional smocked styling for an older infant without the silk-gown price tag. The nine-month sizing fills a market gap, offering authentic craftsmanship at a family-friendly price point for second-stage baby milestones.
3. 32" Girls Cotton Hand Smocked Christening Gown Baptism Dress with Hand Embroidery SM White
Overview: This formal christening gown delivers cathedral-length elegance at 32 inches, crafted from 100% cotton broadcloth for pure, natural comfort. Designed for baptism and dedication ceremonies, the gown features extensive hand embroidery and pin tucking across both bodice and skirt. The included matching bonnet and attached slip create a complete ceremonial ensemble, while the rear sash and smocked stretch allow fit flexibility across multiple baby sizes.
What Makes It Stand Out: The 100% cotton construction appeals to parents prioritizing natural fibers against delicate skin. Extensive hand-embroidery covers both bodice and skirt—not just the yoke—creating a truly luxurious textile artwork. The practical inclusion of a padded hanger and zippered vinyl storage bag demonstrates understanding of heirloom preservation, encouraging families to treasure the gown for generations.
Value for Money: At $199.99, this gown positions itself as an investment piece rather than disposable clothing. The cost reflects extensive handwork, pure cotton fabric, and complete accessory package. Compared to silk alternatives exceeding $250, this offers natural-fiber luxury at a moderate premium. The adjustable fit through smocking and sash extends usable size range, effectively serving multiple children.
Strengths and Weaknesses: Pros: 100% cotton broadcloth; extensive hand-embroidery and pin tucking; adjustable fit via smocking and sash; includes bonnet, slip, hanger, and storage bag; cathedral-length formality; natural fiber breathability. Cons: Requires ironing after washing; cotton less fluid drape than silk; white fabric stains permanently; higher price point may exceed occasional-use budgets; storage bag vinyl may not suit all preferences.
Bottom Line: Ideal for families seeking a natural-fiber christening gown with authentic hand-craftsmanship. The extensive embroidery and thoughtful accessories justify the investment for this once-in-a-lifetime ceremonial garment that will become a treasured family heirloom.
4. Little Things Mean A Lot Girls White Silk Dress Christening Gown Baptism Gown with Smocked Bodice 6M
Overview: This six-month-sized christening gown represents the pinnacle of ceremonial baby attire, hand-tailored from 100% silk for an ethereal drape and luminous sheen. The smocked bodice features precise pin tucking that flows into a gracefully long skirt, creating a silhouette worthy of formal religious ceremonies. Each gown is individually handmade, ensuring unique character and exceptional quality control that mass production cannot replicate.
What Makes It Stand Out: Pure silk construction sets this apart from cotton and polyester blends, offering unmatched elegance and a featherlight feel against baby’s skin. The handmade nature guarantees attention to detail in every seam and smocked stitch. The design intelligently incorporates both smocking stretch and a rear sash, allowing the gown to adapt across several sizes—crucial for babies between six and twelve months.
Value for Money: At $289.40, this is a premium investment reflecting luxury materials and artisan labor. For families prioritizing heirloom quality and ceremonial significance, the price aligns with bespoke garment values. The included accessories—matching bonnet, attached slip, padded hanger, and protective storage bag—add practical value. When compared to custom-made silk gowns, this offers similar quality at a fraction of typical bespoke pricing.
Strengths and Weaknesses: Pros: 100% handmade silk; exquisite drape and luminosity; adjustable fit accommodates growth; includes complete accessory set; superior heirloom potential; breathable natural fiber; six-month sizing targets prime christening age. Cons: Highest price point in category; silk requires delicate care (dry clean recommended); white silk stains permanently; may be impractical for single use; overkill for casual ceremonies.
Bottom Line: For families wanting the absolute finest in christening attire, this silk gown delivers unmatched elegance and heirloom quality. The investment is justified for those who value handmade luxury and plan to preserve the gown as a family treasure for future generations.
5. Petit Ami Baby Girls’ Bishop Zig-Zag Smocked Dress, Newborn, Pink
Overview: Petit Ami’s bishop dress offers a fresh take on traditional smocking with its distinctive zig-zag pattern and pink colorway. Sized for newborns, this 55% cotton, 45% polyester blend balances natural fiber comfort with synthetic durability. The lightweight batiste fabric ensures baby stays cool during spring and summer events, while the bishop-style smocking creates a flowing silhouette distinct from the fitted bubble shape.
What Makes It Stand Out: The zig-zag smocking pattern provides modern geometric interest compared to traditional diamond or picture smocking. Bishop styling offers more skirt fullness and movement, creating a delicate, airy appearance perfect for outdoor celebrations. The higher cotton content (55%) than other Petit Ami pieces appeals to natural-fiber preferences while maintaining machine-washable convenience.
Value for Money: At $45.99, this represents Petit Ami’s premium newborn offering, justified by the complex bishop smocking technique and increased cotton content. The dress style provides more versatility than a bubble suit, potentially serving as both special occasion wear and a casual summer dress. Machine washability eliminates care costs, and the durable blend withstands frequent washing better than pure cotton.
Strengths and Weaknesses: Pros: Unique zig-zag bishop smocking; higher cotton content (55%); lightweight batiste fabric; machine washable; button-back closures for easy dressing; versatile dress silhouette; modern pattern on traditional style. Cons: Higher price than bubble styles; polyester still present; pink color limits formal use; newborn sizing has short usability window; button closures may be trickier than snaps for diaper access.
Bottom Line: A beautiful choice for parents wanting traditional smocking with contemporary pattern variation. The bishop style and increased cotton content justify the modest price premium, making this an excellent versatile piece for newborn photo sessions and warm-weather celebrations.
What Makes Hand-Smocking a True Heirloom Art
Hand-smocking elevates children’s clothing from temporary wardrobe filler to permanent family treasure. This intricate embroidery technique, which gathers fabric into decorative patterns while maintaining stretch, originated as a practical way to create flexible bodices before elastic existed. Today, it represents the pinnacle of slow fashion for little ones—each piece requiring 20 to 40 hours of concentrated needlework by skilled artisans who’ve often trained for years.
The heirloom designation isn’t merely about age; it’s about intentionality. A true heirloom hand-smocked dress is conceived from its very first sketch to survive decades of careful storage and occasional wear. The craftspeople behind these pieces select materials based on how they’ll age, not just how they’ll photograph. They consider the molecular structure of fibers, the chemical stability of dyes, and the tensile strength of threads in ways that mass manufacturers simply cannot afford to contemplate.
The Heritage Behind Smocked Dresses
Understanding the lineage of smocking deepens your appreciation for each piece you consider. English smocking, the technique most associated with heirloom dresses, emerged from the agricultural workers’ smocks of the 17th century. These garments needed to be durable yet flexible enough for fieldwork. The decorative element evolved naturally from the functional gathering stitches.
By the early 20th century, smocking had become a symbol of refined childhood in Europe and America. The intricate patterns signaled both care and social standing—only families with resources could afford such time-intensive clothing. This historical context matters because authentic heirloom smocking still adheres to many of the same principles: natural fibers, hand-sewn construction, and patterns that enhance rather than overpower the child’s form.
Key Characteristics of Museum-Quality Smocking
When evaluating smocking for heirloom potential, look beyond surface beauty. Museum-quality work exhibits several non-negotiable traits. First, the gathering should be perfectly even—each pleat identical in width and depth, creating a honeycomb-like precision that’s almost mathematical in its perfection. The stitches themselves must be microscopic, often 12 to 16 per inch, creating a texture that feels smooth rather than bulky.
The stretch factor is crucial. Authentic smocking should expand and contract gracefully without distorting the pattern or creating puckering at the seams. Test this gently; a quality piece will have surprising elasticity that returns to its original shape immediately. The backside of the work should be as tidy as the front, with no loose threads or knot bumps that could irritate delicate skin or snag during storage.
Fabric Selection: Foundation of Lasting Beauty
The fabric choice determines whether your smocked dress becomes a keepsake or a cautionary tale. For heirloom pieces, natural fibers are non-negotiable. Fine cotton batiste remains the gold standard—its tight weave prevents fraying while its lightweight drape showcases smocking patterns without bulk. Swiss cotton, with its slightly crisp hand, offers excellent stitch definition and remarkable longevity.
Linen, particularly heirloom-weight Irish or Belgian varieties, develops a gorgeous patina over time but requires more careful handling. Silk blends can work for very special occasion pieces but lack the durability for repeated wear and storage cycles. Avoid any synthetic content, even small percentages. Polyester fibers degrade differently than cotton, creating tension that can cause seams to fail and smocking to pucker unpredictably after years in storage.
Thread Quality and Durability Considerations
The thread used in heirloom smocking must outlast the fabric itself. Master smockers exclusively use long-staple cotton floss or silk thread. These materials share similar aging characteristics with quality fabrics, expanding and contracting at comparable rates. This harmony prevents the smocking from literally cutting through the fabric over decades.
Look for threads with colorfastness ratings of 5 or higher—the highest standard for resistance to light, washing, and perspiration. The thread weight should be proportionate to the fabric; too heavy, and it’ll create puckering stress points. Too fine, and the pattern lacks definition. Many heirloom artisans use three strands of six-strand floss, splitting it carefully to maintain consistency. Ask about the thread source; reputable creators often use specific brands like DMC or Au Ver à Soie that have proven archival qualities.
Construction Techniques That Stand the Test of Time
Heirloom construction transcends basic sewing. Every seam should be enclosed—French seams are standard, preventing raw edges from fraying during cleaning or storage. Armholes and necklines require hand-bound edges rather than machine-finished bindings, which can crack and yellow. The smocking itself should be worked before the dress is assembled, allowing the artisan to adjust tension across the entire piece.
Reinforcement matters immensely. Stress points like button plackets and shoulder seams need extra layers of fabric or tiny hand-worked bars of thread. These invisible details separate dresses that last three years from those that last thirty. The hem should be hand-rolled and stitched, creating a finish so fine it nearly disappears. This technique distributes weight evenly, preventing the dreaded hem droop that plagues lesser garments after hanging in closets for extended periods.
Sizing Strategies for Heirloom Pieces
Heirloom smocked dresses require a different sizing philosophy than everyday clothing. Since these pieces often skip generations, sizing up is generally wise—but not excessively. A dress meant for a two-year-old might reasonably fit ages 2-4 due to the smocking’s natural stretch and adjustable features like tie sashes or button-back closures.
Consider the intended use. Christening gowns are traditionally long and flowing, designed to fit newborns through nine months with strategic tucking. Party dresses, however, should fit more precisely to avoid tripping hazards. Many heirloom creators offer “growth tucks”—extra deep hems that can be let down as a child grows, a traditional feature that extends wearable life by years. When in doubt, consult the artisan about sizing for legacy use rather than immediate fit.
Color Palettes That Age Gracefully
Color selection dramatically impacts a dress’s heirloom potential. Traditional ivory and white remain popular for christening and formal wear because they photograph beautifully and show yellowing less obviously than pure white. Soft pastels—particularly blush pink, powder blue, and pale mint—have remarkable staying power when created with high-quality dyes.
Bold colors and trendy shades pose risks. Vibrant dyes often contain less stable compounds that can fade unevenly or transfer to other garments in storage. If you love color, consider deeper jewel tones like navy, burgundy, or forest green, which use more complex dye structures with better lightfastness. Avoid neon shades entirely—they’re chemically unstable and will look dated within years, undermining the timeless quality essential for heirloom status.
Understanding Smocking Patterns and Their Significance
Not all smocking patterns are created equal. Traditional geometric designs—cable, wave, honeycomb, and trellis—have endured for centuries because they distribute stress evenly across the fabric. These patterns create structural integrity that preserves the garment’s shape. Picture smocking, which forms images like flowers or animals, is more decorative but can create weak points where the pattern density changes.
The spacing of smocking rows matters. Rows placed too closely together create stiffness and stress concentration. Ideal heirloom pieces space rows at least 3/8-inch apart, allowing the fabric to breathe and move naturally. The pattern should flow around the body, with increases and decreases worked subtly into the design rather than forced through gathering distortion. Ask about the pattern’s origin; many heirloom artisans use traditional graphed designs passed down through mentoring relationships.
The Importance of Hand-Finished Details
The devil is in the details, and heirloom dresses are no exception. Hand-embroidered accents should complement, not compete with, the smocking. French knots, bullion stitches, and lazy daisies add texture but must be worked with the same thread quality and tension as the main smocking. Machine embroidery anywhere on an heirloom dress is a red flag—it introduces polyester thread and creates stiffness that conflicts with the smocking’s fluidity.
Buttons matter enormously. Mother-of-pearl buttons are traditional for their beauty and durability, but they must be attached with hand-wrapped shanks that allow them to sit properly against the smocked fabric. Buttonholes should be hand-worked, not machine-stitched, creating a clean finish that won’t fray. Even the label matters—hand-embroidered cotton labels won’t damage adjacent fabric during storage like printed polyester tags can.
Care and Preservation Best Practices
Owning an heirloom dress means committing to proper care. Never machine wash a hand-smocked heirloom piece, even on delicate cycles. The agitation can break down the smocking’s structural stitches and create permanent distortion. Instead, hand-wash in cool water with a pH-neutral detergent formulated for vintage textiles. Support the entire dress in your hands while wet; never lift it by one section.
Drying is equally critical. Lay the dress flat on a clean white towel, roll it up to absorb excess moisture, then reshape it on a dry towel away from direct sunlight or heat. The smocking should be gently stretched to its full width during drying to maintain elasticity. Pressing requires a low-temperature iron and a pressing cloth; direct heat can scorch smocking stitches, creating permanent shine and weakness.
Storage Solutions for Long-Term Keeping
Proper storage determines whether your dress emerges in twenty years as a treasure or a tragedy. Never store heirloom dresses in plastic garment bags, which trap moisture and off-gas chemicals. Instead, wrap the dress in acid-free, unbuffered tissue paper, stuffing the bodice and sleeves lightly to prevent creasing. Store it in an archival-quality box made from museum board.
The storage environment matters immensely. Keep the box in a closet on an upper floor—never in basements or attics where temperature and humidity fluctuate dramatically. Ideal conditions are 65-70°F with 45-55% relative humidity. Check the dress annually, refolding it along different lines to prevent permanent creases. Add a sachet of dried lavender or a piece of activated charcoal to deter insects and absorb odors, but never let these touch the fabric directly.
When to Splurge vs. When to Save
Heirloom smocking represents a significant investment, so strategic spending matters. Splurge on foundation pieces: christening gowns, first birthday dresses, and flower girl dresses that will be photographed extensively and saved inevitably. These merit the highest quality fabrics and most complex smocking patterns.
Save on pieces intended for frequent wear or outdoor events. A simpler smocked bishop dress in durable cotton can still be heirloom-quality without elaborate picture smocking or silk accents. Consider “heirloom-inspired” pieces for everyday use—machine-smocked dresses using heirloom techniques can be practical alternatives for playdates and daycare, preserving your investment pieces for special moments.
Custom vs. Ready-Made: Making the Right Choice
Commissioning a custom hand-smocked dress creates a deeply personal heirloom but requires patience and clear communication. Custom work allows you to select exact fabrics, patterns, and sizes while incorporating family elements like great-grandmother’s lace or a monogram. Expect a 6-12 week lead time and a significant price increase over ready-made pieces.
Ready-made heirloom dresses from reputable ateliers offer exceptional quality with more accessible timelines. These creators produce limited runs using the same techniques as custom work but with pre-selected designs. The advantage lies in their expertise—professional smockers have refined their patterns and material combinations over years. When purchasing ready-made, ask about the artisan’s training and whether they offer customization options like monogramming or slight pattern modifications.
Spotting Authentic Hand-Smocking vs. Machine Work
The market is increasingly flooded with machine-smocked pieces masquerading as hand-work. Authentic hand-smocking has slight irregularities that reveal its humanity—stitches that aren’t mechanically identical, subtle variations in tension that create depth. The back will show thread carries between pattern elements, while machine work has a clean bobbin thread line.
Price is a telling indicator. A true hand-smocked dress requires 20+ hours of skilled labor; if the price seems too good to be true, it is. Examine the smocking’s reverse side under good light. Hand-work shows the needle’s path and occasional thread knots (tucked carefully between pleats). Machine smocking has a uniform grid on the back, often with a different colored thread. Ask direct questions: “Was every stitch in this dress made by hand?” Reputable artisans are proud to discuss their process.
Building a Family Collection Over Time
Creating a meaningful heirloom collection happens gradually. Start with one signature piece—a christening gown or first Christmas dress—then add complementary items for subsequent milestones. Coordinate colors and fabrics across pieces so they feel like a curated set rather than random acquisitions. Document each dress with photos of the child wearing it and notes about the occasion.
Consider the emotional narrative. Perhaps every daughter wears the same christening gown, but each receives a unique first birthday dress that reflects her personality. Or build a “sister set” of similar styles in different colors. Keep a journal with each stored dress, recording who made it, the exact date worn, and any special memories. This provenance transforms beautiful clothing into irreplaceable family history.
The Investment Value of Hand-Smocked Heirlooms
While financial appreciation shouldn’t be the primary motivation, quality hand-smocked dresses do hold value. Pieces from renowned smocking artisans can command prices comparable to antique lace or vintage couture, particularly when documented with photos and provenance. The key is preservation—dresses kept in museum-quality condition with their original artistry intact become increasingly rare as mass production dominates.
More valuable, however, is the emotional return on investment. The cost-per-wear might seem high for a dress worn twice, but its value multiplies when it emerges decades later, bringing great-grandmother’s love into a new baby’s nursery. These pieces become touchstones for family stories, connecting generations through tangible beauty. In an era of disposable fashion, that kind of legacy is truly priceless.
Frequently Asked Questions
What exactly is hand-smocking?
Hand-smocking is an embroidery technique where fabric is gathered into tight pleats, then decorated with decorative stitches that hold the pleats in place while allowing stretch. Unlike shirring with elastic, smocking uses only thread tension to create flexibility, requiring thousands of tiny, uniform stitches worked entirely by hand.
How long does it take to create a hand-smocked dress?
A quality hand-smocked dress requires 20 to 40 hours of concentrated handwork, depending on pattern complexity. This includes pleating the fabric, working the smocking pattern, adding embroidery details, and constructing the garment with hand-finished seams. Complex picture smocking or extensive bullion work can push the time closer to 60 hours.
What’s the price range for quality hand-smocked heirloom dresses?
Expect to invest $200 to $600 for a ready-made heirloom-quality smocked dress, with custom pieces ranging from $400 to $1,200 or more. Christening gowns with extensive smocking can exceed $2,000. Price reflects artisan skill, material quality, and time invested—mass-produced “smocked-look” dresses typically cost under $50 but lack heirloom construction.
Can hand-smocked dresses be altered for future generations?
Yes, but only by specialists familiar with heirloom techniques. Simple alterations like letting down hems or adjusting side seams are feasible if the original construction included adequate seam allowances. Resizing the smocked bodice is nearly impossible without completely reworking the piece, which is why sizing up initially is recommended.
How do I clean a hand-smocked dress without damaging it?
Hand-wash in cool water with pH-neutral detergent, supporting the entire garment to prevent stress on smocked areas. Never wring or twist. Roll in a towel to absorb moisture, then reshape flat to dry away from heat and sunlight. For stubborn stains, consult a textile conservator—home treatments often cause more damage than the original stain.
What’s the difference between English smocking and other techniques?
English smocking works stitches over pre-pleated fabric, creating geometric patterns with remarkable stretch and durability. Counterchange smocking uses the fabric’s right and wrong sides to create reversible patterns. American smocking pleats as it stitches, creating a tighter, less flexible result. For heirlooms, English smocking is preferred for its longevity and traditional authenticity.
Are certain fabrics better for heirloom smocking than others?
Fine cotton batiste is ideal for its tight weave, lightweight drape, and stability. Swiss cotton and heirloom-weight linen are excellent alternatives. Avoid synthetic blends, which age poorly and can damage natural fibers stored nearby. The fabric should be pre-shrunk and have a thread count of at least 200 for optimal stitch definition.
How can I tell if a dress is truly hand-smocked?
Examine the stitches under magnification—hand-work shows slight variations and follows the fabric’s natural grain irregularities. The back should show thread carries between pattern elements. Machine smocking has perfectly uniform stitches and a clean grid on the reverse. Price is also indicative; genuine hand-smocking cannot be mass-produced cheaply.
Is it worth investing in hand-smocking for everyday wear?
For daily use, consider heirloom-inspired machine-smocked dresses in durable fabrics. Save true hand-smocked pieces for special occasions where they’ll be treated gently and photographed. The investment is justified for milestone events and pieces you intend to preserve, not for playground attire where stains and wear are inevitable.
How should I store hand-smocked dresses to prevent yellowing?
Wrap in acid-free, unbuffered tissue (not colored or buffered paper) and store in archival-quality boxes made from museum board. Avoid plastic, which traps moisture. Keep in climate-controlled spaces away from light, heat, and humidity fluctuations. Check annually, refolding along different lines, and replace tissue every few years to prevent acid migration.