This cap was specifically designed for optimal outdoor use. Made with treated cotton duck, nylon patterned webbing, and a plastic visor which keeps the cap afloat (like rafting). The Strap-Cap also has a black underbill to reduce glare and an easy gliding size adjustment which cinches down tight to keep that baby on in the most extreme conditions. These hats come embroiedered with the Outdoor Gear Exchange logo. Try it, you'll love it! Medium fits most head sizes.