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How to wash a wool sweater

A short, no-nonsense walkthrough — the steps, the gotchas, and answers to the usual questions.

20 minutes active, plus drying time Moderate

Wool sweaters stay soft and keep their shape when washed gently in cool water and dried flat. This shows you how to hand wash a wool sweater without shrinking or felting it, and how to reshape it while it dries.

What you'll need

  • A wool-safe or gentle detergent
  • Cool water
  • A clean basin or sink
  • Two large towels

Step by step

  1. Read the care labelCheck whether the sweater is hand-wash or dry-clean only. Some wools such as superwash are machine safe, but most benefit from gentle hand washing.
  2. Fill a basin with cool waterUse cool or lukewarm water and mix in a small amount of wool-safe detergent. Sudden temperature changes and hot water cause wool to shrink and felt.
  3. Soak and press gentlyTurn the sweater inside out, submerge it, and press the soapy water through it for a few minutes. Do not rub, wring, or agitate the fibers.
  4. Rinse in cool waterDrain the basin and refill with clean cool water, pressing gently to rinse out the soap. Repeat until the water runs clear.
  5. Remove excess water in a towelLift the sweater supporting its weight, lay it on a towel, and roll the towel to squeeze out water. Never hang a wet wool sweater.
  6. Dry flat and reshapeLay the sweater flat on a dry towel, gently pat it back to its original shape, and let it air-dry away from heat and sunlight.

Handy tips

  • Always dry wool flat, since hanging it wet stretches the shoulders and lengthens the body.
  • Store sweaters folded rather than on hangers to keep their shape.
  • If the sweater pills, remove the fuzz with a sweater comb or fabric shaver rather than pulling it off.

Heads up

  • Hot water, machine agitation, and wringing can shrink and felt wool permanently. If that happens, the fibers cannot be fully restored to their original size.

FAQ

Can I machine wash a wool sweater?

Only if the label says it is machine washable or superwash. Even then, use a wool or delicate cycle with cool water and a gentle detergent.

My sweater shrank. Can I fix it?

Sometimes. Soak it in cool water with a little hair conditioner, gently stretch it back toward shape while damp, and dry it flat. Results vary and are not guaranteed.

How often should I wash a wool sweater?

Wool resists odor, so wash it only every few wears or when soiled. Airing it out between wears often refreshes it without a full wash.