The Columbia Men's Bora Bora Booney II Hat is a high-performance fishing hat that battles the heat. It combines UPF 50 fabrication, which blocks out 98% of harmful UVA and UVB rays, and an Omni-Wick® sweatband, and mesh vent panel, which is non-UPF, to keep you cool and prevent the sweat from dripping in your eyes.