Featuring UPF 50 to block out 98% of harmful UVA and UVB rays and carrying the Skin Cancer Foundation's seal of recommendation, the Bora Bora Booney is definitely more than your average fishing hat. An Omni-Wick sweatband combines with a mesh vent panel (which is non UPF) to keep you cool and the sweat from dripping in your eyes. Quick-dry properties mean that even if this hat takes a dunk with you, it'll be dry in no time. Fabric: Shell: 100% textured nylon poplin. Lining: 100% polyester. Omni-Shade UPF 50 sun protection. Omni-Wick sweatband and mesh. Adjustable chin strap. Adjustable drawcord and toggle at back.