Gore Bike Wear Men's Oxygen Thermo Jersey Tight fit Tight fit 87% Nylon, 13% Spandex; INSERT: 44% Nylon, 37% Polyester, 19% Spandex Machine wash warm. Permanent press cycle. Do not bleach. Do not tumble dry. Dry or steam iron low. Wash with similar colors. Wash inside out. Drycleaning not recommended.