OTTO CAP 5 Panel Running Hat, Elevate Your Performance with Our Specialized Running Hat!. Ultra-Lightweight Poly Spandex Ripstop Fabric - A flexible, quick-drying grid pattern designed to resist tearing FlexFold Visor - Shape-adaptive construction that retains its shape after folding Compact - Designed to fold easily, making it perfect for pockets, bags, or travel Laser-Perforated Sides - Circle perforations maximize ventilation for superior cooling Stretch Quick-Release Hook Loop w D-ring - For easy adjustment and a snug fit Cool Comfort Stretchable Performance Sweatband - Antibacterial, anti-odor and moisture wicking properties