Outdoor Research Activeice Cap KNIT HAT. SHELL 1: 91% POLYESTER 9% ELASTANE, SHELL 2: 92% POLYESTER 8% ELASTANE, SHELL 3: 100% POLYESTER. Imported Breathable Mesh Panels and Fabric-Covered Folding Brim Active Cooling Breathable and Lightweight UPF 50+ Sun Protection Sun Cape for Added Sun Protection