Nammu is a UV-blocking sun protection swim cap designed to protect the head from the sun’s harmful rays while in and around water. Fashioned like a trendy bandana, the fitted swim cap is designed to stay in place during any activity. It is easy to care for and conveniently tucks away in a pocket or bag. The Nammu swim hat is "fashionable and fun to wear, and it ties in the back so it never falls in the water," Nammu Owner Atar Morgenstern told TDmonthly.