You know every ounce counts when you're logging the miles, so we built this collection with the lightest, most breathable fabrics Soft, ultra-lightweight fabric delivers superior breathability & incredible comfort Material wicks sweat & dries really fast Anti-odor technology prevents the growth of odor-causing microbes Generous ½ zip front makes for easy layering Dropped, side-vent hem Style #: 1370333 100% Polyester Imported Fitted:Streamlined fit that’s not too tight or too loose. Machine wash cold with like colors Use only non-chlorine bleach if needed Tumble dry low Do not iron Do not use softeners Do not dry clean