Product Features: * Athletic slimmer fit design * Very lightweight and breathable * Incredibly stretchy 90% polyester, 10% spandex design * Wrinkle resistant * Moisture wicking * Anti-odor * UPF 40+ protection For best machine wash results use a gentle setting with cold water, no fabric softener, hang to dry. Your shirt is kept fresh and safe in a reusable and resealable plastic bag to minimize waste. All products are shipped in a 100% biodegradable poly bag to help keep our golf courses green. For more sizing information please see our Sizing Guide.