UPF 50+ · STAYS ON THROUGH DIVES & WAVES

The sun hat that swims

Covers your scalp, ears and the back of the neck – and it stays on.

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Nammu Classic Solid Colors

BESTSELLER

Nammu Classic Solid Colors

★★★★★ (122)
$6–$15Shop →
Nammu Extra UV Pro Ear Flap

BEST FOR SNORKELING
Nammu Extra UV Pro Ear Flap

★★★★★ (24)
Nammu EX UV Protection 360
Nammu EX UV Protection 360

★★★★★ (11)

Who wears Nammu

Swimmers, snorkellers and anyone who needs sun protection that survives being in the water. Also people who have given up on it: alopecia, cochlear implants, hair loss after chemotherapy, and children who pull off every other hat within a minute.

Martha
Martha
Verified ownerVerified owner
5/5

It felt comfortable. It totally protected my head from the sun. It was very relaxing to float in the water, feel the coolness of the water, and not have my head get sunburned.

2 days ago
Nammu Classic print swim hats in all available patterns
Nammu Classic print
Keith K.
Keith K.
Verified ownerVerified owner
5/5

Will protect my head from the sun when snorkelling in Bora Bora. Fast shipping and excellent fit, I had XL size

7 days ago
nammu sun protection swim hats classic solid colors
Nammu Classic Solid Colors
Tracey Yurkin
Tracey Yurkin
Verified ownerVerified owner
5/5

Love these hats! This was my second hat in this style, in black instead of light grey. I use the black one while gardening, so it doesn't show the dirt so easily. It's such a great all purpose hat, in and out of the water. I have never liked wearing hats because my head is small and regular hats are always a bit big. The stretch in these mean they fit nicely and it's so light, I forget I have it on.

1 week ago
Nammu Extra UV Pro swim hat with visor
Nammu Extra UV Pro Visor
Tracey Yurkin
Tracey Yurkin
Verified ownerVerified owner
5/5

I bought this one for my husband after enjoying mine for a few months. It's perfect for protection while in and on the water. He loves it - it fits well, is lightweight and very comfortable.

1 week ago
nammu sun protection swim hats classic solid with visor
Nammu Classic Visor
Indira
Indira
Verified ownerVerified owner
5/5

I always burn my scalp when snorkeling. Finally I have a way to protect my skin

2 weeks ago
nammu sun protection swim hats classic solid colors
Nammu Classic Solid Colors

Which Nammu is right for you?

Why Choose Nammu?

  • It stays on. A tie-back instead of a chin strap, so nothing to pull off and nothing to lift when you go under.
  • Coverage that doesn’t wash off. Sunscreen needs reapplying and rinses off within minutes in the water. Fabric doesn’t.
  • It survives a suitcase. Visor styles pack completely flat and spring back into shape. Straw and structured brims do not.
  • Covers what sunscreen misses. Scalp, ears and the back of the neck, which is where snorkellers burn.
  • Fits a whole family. Toddler from age two through adult, $15 to $25.
  • Made for adaptive needs. Alopecia, cochlear implants and hair loss after chemotherapy.

Common questions

Do swim hats actually stay on when you swim?

Most sun protection fails at exactly this point. A brimmed sun hat lifts the moment your head goes under, and a standard swim cap leaves your ears and neck bare. A fitted hat with a tie-back stays put through dives, waves and lane swimming.

Does a swim hat replace sunscreen?
Not entirely, but it covers the places sunscreen struggles. Sunscreen needs reapplying every couple of hours and rinses off within minutes in the water. A hat that stays on covers your scalp, ears and the back of your neck for as long as you’re swimming.

What can I wear swimming if I have alopecia or no hair?

A soft fitted swim hat covers the scalp, ears and neck without the tightness of a silicone cap. Nammu hats are worn by people with alopecia, cochlear implants and hair loss after chemotherapy, and are listed by the National Alopecia Areata Foundation.

Will a sun hat survive being packed?

Nammu’s visor styles pack completely flat and return to shape when you unpack them, and hold that shape wet. Most wide-brim sun hats arrive bent.

What size do I need?

One size fits most heads from age two through adult, with an XL for head circumference over 21.5 inches. The tie-back adjusts the rest.