You know every ounce counts when you're logging the miles, so we built this collection with the lightest, most breathable fabrics Super-soft, cotton-blend fabric provides all-day comfort Ribbed collar Style #: 1370337 60% Cotton/40% Polyester Imported Fitted:Streamlined fit that’s not too tight or too loose. Wash garment inside out Machine wash cold with like colors Use only non-chlorine bleach when needed Tumble dry low Do not iron Do not use softeners Do not dry clean