NCAA Michigan State Spartans Mountain Bike Cycling Jersey 100% Polyester Imported 100 % Treated Dri-Fit Moisture Control Polyester Fabric with Sublimated Graphics Vented Side Panels Raglan Sleeves Wash in cold water with a powder detergent. Allow the garment to air dry. Drying the garment in a drying machine will reduce the effectiveness of the Dri-Fit technology. Do not bleach. Wash inside out with like colors.Do not dry clean. polyester