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 #: 1370372 60% Cotton/40% Polyester Imported Loose:Fuller cut for complete comfort. 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