Babies and toddlers have thin, sun-sensitive skin, and there is not much shade on a pool deck or a beach. Nammu’s swim hats come in an XS size built for this age range, with the same adjustable tie-back and UPF 50+ fabric as the rest of our lineup.
Sized for Babies and Toddlers
Our size chart lists XS (17.5 inches / 44.5 cm) as the best fit for babies and toddlers. If your little one is between sizes or growing fast, our One Size option (up to 21.5 inches / 54.6 cm) fits kids of all ages and most adults, so there is room to size up.
A Tie-Back That Actually Stays On
Regular swim caps rely on a snug, stretchy fit, which a toddler can easily pull off, and floppy sun hats blow off or float away the moment a wave hits. Nammu’s adjustable tie-back secures the hat around the head so it stays on through splashing, dunking, and pool play instead of ending up at the bottom of the pool.
Real UPF 50+ Protection
Every Nammu hat is made from a UPF 50+ nylon-spandex blend (80% nylon, 20% spandex) that blocks 98% of UV rays and dries quickly between activities, so your child is not stuck sitting in a wet hat.
FAQ
Are Nammu swim hats waterproof?
No fabric is truly waterproof, and we do not claim ours is. What keeps a Nammu hat working in the water is the tie-back: it holds the hat securely on your child’s head through waves, dunking, and splash pads, and the fabric dries fast once you are out of the water.
What size should I get for my baby or toddler?
Start with XS, Nammu’s smallest size, listed as the best fit for babies and toddlers. Measure around the head just above the ears with a soft tape measure or a piece of string, then check the result against our size chart.
Where can I buy Nammu baby and toddler swim hats?
Nammu ships worldwide and hats are available in sizes XS through XL, backed by over 340 verified customer reviews on our site.
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