How to Wash and Care for a Wool Sauna Hat (So It Lasts for Years)

Rinse cool, squeeze gently, reshape and air dry. How to wash and care for a wool sauna hat so it keeps its shape for years.

CALOR Sauna Guides7 October 2026 · 2 min read
How to Wash and Care for a Wool Sauna Hat (So It Lasts for Years)
Care4 min readCALOR Sauna Guides

Quick answer

Rinse your wool sauna hat in cool water, gently squeeze out the water (don't wring hard), reshape it and let it air dry on a hook or over a bowl, away from direct heat. Avoid the washing machine, tumble dryer and hot water, which can shrink or misshape felt.

WashCool water rinse
DryAir dry, reshape
AvoidMachine & dryer
StoreHang to breathe

After every session

Hang your hat on a hook so air can circulate. Wool is naturally good at handling moisture, and letting it dry fully between sessions keeps it fresh.

When to wash it

Rinse it every few sessions, or whenever it feels sweaty. There's no need to wash it after every use.

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3mm New Zealand merino, hand-felted

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How to wash a wool sauna hat

  1. Fill a basin with cool water. Add a small amount of wool wash if you like.
  2. Submerge the hat and gently press the water through the felt.
  3. Rinse in clean cool water.
  4. Gently squeeze out the water. Don't twist or wring hard.
  5. Reshape the crown and brim with your hands.
  6. Air dry on a hook, or over a bowl to hold the shape, away from heaters and direct sun.

Never put a wool sauna hat in the dryer or leave it on a hot sauna stove to dry. Heat plus agitation is what shrinks felt.

What to avoid

  • Washing machines and tumble dryers
  • Hot water
  • Bleach or harsh detergents
  • Drying directly on heaters, stoves or in strong sun

Is some change in shape normal?

Yes. Felt is a natural material and relaxes slightly to your head over time. That's part of what makes it comfortable. Reshaping it while damp keeps it looking its best.

Frequently asked questions

Can you put a wool sauna hat in the washing machine?

It's not recommended. Agitation and warm water can shrink or misshape felt. Rinse it by hand in cool water instead.

How do you dry a sauna hat?

Reshape it and let it air dry on a hook or over a bowl, away from direct heat.

How often should you wash a sauna hat?

Rinse it every few sessions, or whenever it feels sweaty. Let it air between every session.

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