How to Wash a Beanie Hat Without Shrinking It

To wash a beanie hat without shrinking it, check the care label, turn the hat inside out and hand wash it in cool water with a little mild or wool detergent. Squeeze the water through the knit rather than rubbing it, rinse at the same cool temperature, press the water out in a towel, then reshape the hat and leave it to dry flat, away from radiators and the tumble dryer. Most acrylic beanies can also go in the washing machine on a cool, gentle cycle inside a mesh laundry bag, but wool beanies are safer washed by hand.

Shrinking and stretching both come down to heat and movement. Below are step-by-step methods for hand and machine washing, bobble hat care, and how to rescue a beanie that has already gone wrong.

Start with the fabric and the care label

The label inside the cuff tells you more than any general guide can, so read it before anything else. The wash tub symbol shows the maximum temperature in degrees Celsius, a hand in the tub means hand wash only, and a crossed-out square with a circle inside means do not tumble dry. The GINETEX guide to care symbols explains each one if you are unsure.

The fibre matters just as much, because different yarns fail in different ways:

• Wool, merino, lambswool and cashmere can felt. Warm water and rubbing make the fibres lock together, and the hat ends up smaller, thicker and stiffer. Felting cannot be undone.
• Acrylic and polyester do not shrink in the same way, but high heat can relax the knit so the hat goes limp and loses its stretch. They are the easiest beanies to look after.
• Cotton can shrink a little in a hot wash or tumble dryer, and it takes longer to dry.

If the label is missing or faded, treat the hat as wool: cool water, hand wash, dry flat.

How to hand wash a beanie hat

Hand washing is the gentlest method and the safest choice for wool, chunky knits and bobble hats.

1. Remove the bobble if you can. Many pom poms are attached with a popper or tie on the inside.
2. Turn the hat inside out. This protects the outer face and lets the water reach the inside band, where sweat and skin oils build up.
3. Fill a bowl or sink with cool water. Stir in a small amount of wool wash or mild liquid detergent before the hat goes in, so the detergent is not concentrated on one spot.
4. Submerge and soak. Press the hat under the water until it is soaked through, then leave it for around ten minutes. For wool, the soak does the cleaning, not your hands.
5. Squeeze gently. Press the water through the knit a few times, paying attention to the band. Do not scrub, twist or stretch it.
6. Rinse at the same temperature. Empty the bowl and refill it with clean water that feels the same as the wash water. A sudden change from warm to cold is one of the things that encourages wool to felt.
7. Press out the water. Lift the hat in both hands rather than by the cuff, which can stretch under the weight of the water. Lay it on a clean towel, roll the towel up and press down. Never wring a beanie.

Can you put a beanie in the washing machine?

Often, yes, if the care label allows it. Acrylic and polyester beanies usually cope well with a machine wash, and some wool beanies are labelled as machine washable on a wool programme. To keep the risk low:

• Turn the hat inside out and put it in a mesh laundry bag, or a zipped pillowcase if you do not have one. On its own, a small hat gets pulled around and rubbed against everything else in the drum.
• Choose a wool, hand wash or delicates cycle at 30°C or below.
• Use a low spin speed. A fast spin can flatten the rib knit around the band.
• Keep it away from towels, which shed lint, and anything with zips or Velcro.
• Use a small dose of mild liquid detergent and skip the fabric softener, which can leave synthetic yarns feeling limp over time.

If the label says hand wash only, or the hat is wool without a machine-wash symbol, it is safer to wash it by hand.

How to dry a beanie so it keeps its shape

Drying is where most beanies are ruined, so it is worth being patient.

• Reshape it while it is damp. Turn it the right way out, ease the crown back into a rounded shape and smooth the cuff to its usual width without pulling it open.
• Dry it flat. Lay it on a dry towel or a flat drying rack at room temperature. Turn it over once so both sides dry evenly.
• Keep it away from direct heat. Do not put it on a radiator, in front of a heater or in the tumble dryer. Heat is what shrinks wool and stretches acrylic out of shape.
• Do not hang it by the cuff. Pegging a wet beanie on a line or a hook lets the weight of the water drag the knit longer.

Make sure it is completely dry before you put it away, as a damp hat in a drawer can start to smell musty.

How to wash a bobble hat

Pom poms need a little extra care, especially faux fur ones.

• Detachable bobble: take it off, wash the hat as above, and refit the bobble once the hat is dry.
• Faux fur bobble: do not soak it. Wipe any marks with a damp cloth and a tiny amount of mild detergent, then leave it to air dry and fluff it up with your fingers or a wide-tooth comb.
• Yarn bobble that is sewn on: hand wash the whole hat, squeeze the bobble gently in the towel, then shake and fluff it while it dries.

Avoid putting a hat with a sewn-on faux fur bobble in the washing machine, as the fur can mat and the stitching can loosen.

How to wash a kids' beanie

Children's hats get grubby faster, so spot clean small marks with a damp cloth between full washes. Wash in the evening so the hat has time to dry flat before the next school run, and use a mesh bag in the machine so a small hat does not vanish into a duvet cover.

If you are choosing a hat for the winter ahead, our guide on how to choose a kids winter hat covers fit, sizing and beanie versus padded styles. Our kids' black knit beanie is a simple one-size cuffed design without a bobble, so there is nothing to remove before washing. Follow the care label on the hat itself.

What to do if your beanie has shrunk or stretched

It depends on what has happened to the knit.

If it has felted, the hat will feel denser and stiffer and you will no longer see clear stitches. Felted wool cannot be returned to its previous size.

If it is only tight or misshapen and you can still see the stitches, it is worth trying to reshape it. Soak it in cool water with a little wool wash or hair conditioner for about ten minutes, press the water out in a towel, then ease it gently to a better size and let it dry stretched over something round, such as an upturned bowl or a small ball. Do not force it, as overstretched yarn can thin or snap.

If it has stretched and gone baggy, washing it by hand and drying it flat, reshaped slightly smaller than its stretched size, can help it tighten up a little. A heavily stretched acrylic beanie that has been heat damaged will not fully recover.

How often should you wash a beanie?

There is no fixed rule. A hat worn daily may need a wash every few weeks in winter, while one worn occasionally can go much longer. Airing it between wears helps, and wool resists odours better than synthetic yarns.

If your winter wash pile also includes cosy socks and slipper socks, our guide on how to wash fluffy socks without ruining them uses the same low-heat approach.

Frequently asked questions

Can you tumble dry a beanie?

It is best not to. The heat and tumbling can shrink or felt wool and stretch acrylic out of shape. Even if the label allows a low tumble, drying flat at room temperature is the safer choice.

Can you wash a beanie in hot water to shrink it?

Hot water can make a wool beanie shrink, but the result is hard to control and it often felts the hat unevenly. Acrylic beanies usually will not shrink this way. If a hat is only slightly too big, folding the cuff over once more is a safer fix.

What detergent should I use for a wool beanie?

A wool wash or a mild liquid detergent designed for delicates is best. Avoid biological detergents on wool unless the bottle says they are suitable, and leave out bleach and fabric softener.

The bottom line

Cool water, gentle handling and drying flat away from heat will keep most beanie hats soft and the right size for years. Check the label, wash wool by hand, use a mesh bag and a cool cycle for machine-washable acrylic, and never wring or tumble dry. If you are topping up your cold-weather basics, you can browse hats, gloves and socks in our winter collection.