Nammu Classic Reversible The Nammu Classic Reversible is a UPF 50+ swim hat that gives you two stylish looks in one. Flip it inside out to switch between two colors or prints whenever you want a fresh style. Made from 80% nylon and 20% spandex with the signature triangle back, it is lightweight, quick-drying, and stays secure during swimming, snorkeling, and water sports. Suitable for all ages, hair types, and adaptive needs including alopecia. Available in Small and One Size.