How to Care for Wool Garments: Washing, Storing, and Repairing for Decades of Wear
Wool can last decades if cared for correctly — or pill, shrink, and fail in a season. The complete guide to washing, drying, storing, and repairing wool sweaters, suits, and base layers.
Wool is the most rewarding fabric to own and the most punished by careless care. A quality wool sweater, suit, or coat can last 20+ years with the right treatment. The same garment thrown in a hot wash cycle and a dryer fails in one season.
This guide walks through care for every wool type.
UNDERSTANDING WOOL FIBERS
Wool fibers have microscopic scales along their length. When wet, these scales can interlock under agitation — that is what causes felting and shrinkage. Hot water plus agitation plus pressure equals shrinkage.
Different wool types respond differently. Merino is finest and most delicate. Lambswool is fine but sturdy. Shetland is coarser and tolerates more. Cashmere is finest of all and the most easily damaged.
When in doubt, read the label. Modern wool garments often have specific care instructions that override general rules.
WASHING WOOL SWEATERS
Wash infrequently. Wool resists odor better than nearly any other fabric. Most wool sweaters need washing only after 5-10 wears, not after each. Air them out between wears.
For most wool sweaters: hand-wash or use the wool cycle.
Hand-wash method:
1. Fill a clean sink or tub with lukewarm water (60-85°F). Add a small amount of wool-specific detergent (Eucalan, The Laundress Wool & Cashmere Shampoo, or any pH-neutral mild detergent).
2. Submerge the garment. Gently press water through it. Do not wring or twist.
3. Soak 10-30 minutes. For visible dirt or sweat, gently work the area with your hand.
4. Drain. Refill with clean lukewarm water. Press to rinse. Repeat until water runs clear.
5. Drain. Press out water gently — do not wring. Lay the garment on a towel, roll the towel to absorb water.
6. Lay flat to dry on a fresh towel or a drying rack. Reshape to original dimensions. Never hang wet wool — it stretches.
Machine method:
1. Use the wool cycle (cold water, minimal agitation).
2. Wool-specific detergent in the dispenser.
3. Place the garment in a mesh laundry bag for extra protection.
4. Spin cycle on low (not high — high spin pulls fibers).
5. Remove immediately when done. Lay flat to dry.
Dry cleaning. Reserved for structured wool garments — suits, sport coats, structured coats. Use a reputable cleaner. Frequent dry cleaning is harsh on fibers; once or twice per season is plenty.
WHAT NEVER TO DO
Hot water — felts wool.
High-spin agitation — felts wool.
Dryer heat — felts wool catastrophically. A single dryer cycle can turn a sweater into a doll-sized version of itself.
Wringing — stretches and warps fibers.
Hanging wet — stretches the garment vertically.
Bleach — destroys wool fibers chemically.
Regular laundry detergent — too harsh, strips natural lanolin.
WASHING WOOL BASE LAYERS
Merino base layers (technical performance wool) are designed to be machine-washable.
Cold or lukewarm water, gentle cycle. Wool detergent or a small amount of standard detergent. Hang dry or tumble dry on low (some merino base layers are dryer-safe — check the label).
The fabric is engineered to tolerate normal care. Do not panic-wash by hand.
WASHING WOOL SUITS AND DRESS WOOL
Wool suits, sport coats, and dress trousers should be dry cleaned, but infrequently — once or twice per season.
For refreshing between cleanings: hang outdoors in fresh air for an hour, or in a steamy bathroom for 20 minutes. Steam relaxes fibers and removes wrinkles. Brush with a soft clothes brush to remove dust and lint.
For spot stains: blot immediately with a clean cloth and cool water. Take to a dry cleaner before the stain sets. Never rub — rubbing pushes the stain deeper.
DRYING
Lay flat. Reshape to original dimensions. Use a fresh dry towel under the garment.
Avoid direct sunlight — UV degrades wool fibers and can fade colors.
Avoid heat sources — radiators, heating vents, dryers, fireplaces. Heat warps fibers and shrinks.
The garment is dry when no part feels cool to the touch. Sweaters typically take 24-48 hours to fully dry. Patience is part of wool care.
STORING WOOL
Store clean. Stains attract moths and bugs.
Fold sweaters; do not hang them (gravity stretches knit fibers). Hang structured items (suits, sport coats) on padded hangers with shape support.
Store in cedar drawers, cedar chests, or with cedar blocks. Cedar repels moths.
For long-term storage (off-season), use breathable cotton or muslin bags. Plastic bags trap moisture and can encourage mildew.
Avoid mothballs unless absolutely necessary. The smell lingers in fibers for months and is unpleasant to wear.
MOTH AND PEST PROTECTION
Moths and carpet beetles are the wool wearer's enemy. Their larvae eat wool fibers.
Prevention:
Store clean — moths target body oil and food residue, not the wool itself.
Use cedar (blocks, hangers, lined drawers).
Lavender sachets are a pleasant secondary deterrent.
Freeze suspected items for 48 hours, thaw 24 hours, freeze again 48 hours. Kills larvae without damaging fibers.
Vacuum and dust storage areas regularly.
Rotate stored items every 2-3 months.
If you find moths, treat all stored wool immediately — they spread fast.
DEALING WITH PILLS
Pills (small balls of tangled fiber) form on most wool over time. They are not damage — they are wool doing what wool does, especially on areas of friction (underarms, cuffs, sides).
Use a fabric shaver, sweater stone, or razor (carefully) to remove pills. Done correctly, pill removal restores the original look of the sweater.
Quality wool pills less than cheap wool. Long-staple merino, cashmere, and quality lambswool maintain a smoother surface longer.
REPAIRING WOOL
Wool is the most repair-friendly fabric. Holes, snags, and worn elbows can all be addressed.
Small holes: darning. Sew matching wool yarn through the hole in a weaving pattern. Invisible repair with practice.
Moth holes: darning, with carefully matched yarn. Severe damage may need a knitting professional.
Snags: pull the snag through to the inside with a needle, secure with a knot. Do not cut.
Worn elbows: elbow patches in leather or contrasting wool. Adds character and extends life.
Lost button or worn buttonhole: replace or repair. Common alteration.
Most dry cleaners offer wool repair services. Specialist knitwear repair shops exist in most cities and can do near-invisible work on cashmere or fine wool.
SEASONAL WARDROBE STORAGE
When storing wool sweaters for the off-season:
1. Wash or dry-clean all items before storage.
2. Fully dry — no residual moisture.
3. Fold and store in cedar chests, cedar drawers, or breathable cotton garment bags.
4. Add cedar blocks or lavender sachets.
5. Inspect every 2-3 months.
For wool suits and dress wool, store on padded hangers with shape supports, in breathable garment bags.
KEY TAKEAWAY
Wool rewards care. A quality wool sweater, treated correctly, can last 20+ years. Wash infrequently. Wash gently. Dry flat. Store cleanly. Repair small damage promptly. The right care turns a $200 sweater into a lifetime garment.