Key Product Features. Low Profile - Shallow crown for a relaxed, casual fit Cool Comfort Performance Stretchable Knit - Lightweight stretch fabric engineered for movement and breathability Moisture Wicking UV Guard Technology - Wicks away sweat and blocks harmful UV rays Enclosed Back - Clean, fitted design for a streamlined look Matching Color Undervisor Except for Neon Colors OTTO FLEX Stretchable Sweatband - A snug, flexible fit with antibacterial, anti-odor and moisture wicking properties