Outdoor Research Wind Pro Hat -Black-S/M. Its made of a hard-faced fleece that is wind resistant water repellent and highly breathable. Specifications for Outdoor Research Wind Pro Hat - Men's: Manufacturer: Outdoor Research Gender: Unisex Age Group: Adults Color: Black Fabric/Material: 60percent cotton 35percent polyester 5percent elastane Water Resistance Level: None Additional Features: Seam Taped Weight: 1.9 oz Features of Outdoor Research Wind Pro Hat Wind-Resistant Wicking Double-Layer Fabric on Earband Segmented Crown Construction Reflective Logos Outdoor Research 2435920001015: Wind Pro Hat -Black-S/M