Columbia Trail Dryer Cap - Women39;s 86% polyester/14% elastane shell, with 100% polyester sides, 92% polyester/8% elastane brim. Omni-WICK EVAP advanced evaporation keeps you cool and comfortable at the height of sweat-infused activity. Omni-FREEZE ZERO sweat-activated, super cooling technology Omni-SHADE UPF 50 sun protection. Vented