5 Panel Shallow fit, side mesh panels and an elastic rear waist tie makes this unique. Plastic fittings so no rust if used in the salt water. Lose our hats sometimes in waves? We added a red internal to make it visible. You didn&';t know you needed this hat so badly until now. 95% Polyester, 5% Spandex, EVA Visor, Square and Flat Brim, Coolmax Sweatband.