Shaped hem for a modern fit Secure left chest pocket for added convenience Stretch mesh back panel for enhanced ventilation Material wicks sweat & dries really fast UPF 50+ protects your skin from harmful UV rays Stretch woven fabric is lightweight & comfortable Care Instructions: Do not dry clean Do not use softeners Machine wash cold with like colors Do not iron Do not bleach Tumble dry low We made a button-down built for the job, with athletic performance. It keeps off the sun, it's light, stretchy, and super-breathable.