Fabric is brushed for ultimate softness 4 way stretch for customizable fit Fits comfortably underneath helmets Made with durable polyester material Withstands heavy winds as well as strenuous activity In the Box 1X Skull Cap Beanie Specifications: Brand ZAN Headgear Material 87% Polyester, 13% Elastane Coverage Head Machine Washable Yes Size One Size Fits Most Color BLACK California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov