What Our Gearhead(R) Experts Are Saying:"This hat is my go-to for desert hikes or long fishing days. The cooling effect is real-once I start sweating, the fabric kicks in and keeps me noticeably more comfortable. The wide brim gives great sun coverage, and the packable cape adds bonus protection when I need it."When the sun's blazing and the air's still, we reach for the Coolhead Zero IV Booney Hat. Built for the harshest heat, this wide-brim hat uses Columbia's Omni-Freeze ZERO(TM) technology, which activates on contact with sweat to provide a refreshing cooling effect just when we need it most. Add in UPF 50 sun protection from Omni-Shade(TM) and a breathable, quick-drying design, and this hat's ready for everything from high-elevation hikes to slow days on the water. A packable cape offers neck coverage without adding bulk, while the adjustable chin strap and 3. 5-inch brim keep the fit secure and shade reliable, even when the wind picks up. Lightweight, rugged, and easy to wear all day, the Coolhead Zero IV Booney is a must for any sun-soaked mission.