How to Care for Wool Garments: Washing, Storing, and Repairing for Decades of Wear
Wash, dry, store, depill, and repair wool garments according to the care label, construction, and type of damage rather than one universal routine.
Wool is the most rewarding fabric to own and the most punished by careless care. A well-made wool sweater, suit, or coat can last many years when its care label, construction, and use are respected. Heat and agitation can permanently shrink or felt many untreated wool garments.
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. Wash when odor, soil, or the care label calls for it rather than after every wear. Air the garment between wears.
For most wool sweaters: hand-wash or use the wool cycle.
Hand-wash method:
1. Fill a clean sink or tub with cool or lukewarm water, following the garment and detergent labels. Add a small amount of wool-safe detergent.
2. Submerge the garment. Gently press water through it. Do not wring or twist.
3. Soak only as directed by the detergent label. Gently press visible soil; do not scrub.
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. Do not hang wet wool; the weight can distort it.
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 promptly when done. Lay flat to dry.
Dry cleaning. Reserved for structured wool garments — suits, sport coats, structured coats. Use a reputable cleaner. Dry-clean only when the label or visible soil requires it; excessive cleaning can shorten garment life.
WHAT TO AVOID
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 a difficult stain to a cleaner before it sets. Do not rub, because friction can spread the stain or disturb the surface.
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. Drying time varies with garment weight, room humidity, and airflow. Wait until the garment is fully dry before storing it.
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 clean wool in a sealed container or a well-maintained garment bag. Cedar scent may discourage some moth activity, but it does not replace cleaning, inspection, and a closed container.
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.
For a suspected infestation, isolate the garment and use a textile-conservation or pest-control method appropriate to the item; household freezing is not reliable unless temperature and duration are controlled.
Vacuum and dust storage areas regularly.
Inspect stored items periodically for larvae, webbing, or new holes.
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.
Pilling depends on fibre length, yarn twist, knit structure, finishing, and friction; price alone does not predict it.
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 for many years. Wash infrequently. Wash gently. Dry flat. Store cleanly. Repair small damage promptly. The right care can extend the useful life of a good sweater.