Gore Bike Wear Helmet IV Cap SHELL: 100% Polyester WINDSTOPPER MEMBRANE LINING: 100% Polyester INSERT: 87% Nylon 13% Elastane Imported WINDSTOPPER Soft Shell WINDSTOPPER Soft Shell FACE: 100% Polyester; BACKING: 100% Polyester with a WINDSTOPPER Membrane; STRETCH: 84% Nylon, 16% Spandex Machine wash cold. Permanent press cycle. Do not bleach. Do not tumble dry. Do not iron. Wash with similar colors. Wash inside out. Do not dryclean.