Lightweight button up fishing style shirt with Solar-Factor UPF 40+ UV Protection and added spandex for increased range of motion. Solar-Factor UPF 40+ UV Protection Soft and Comfortable Polyester Spandex Vented Cape Back Bellow Chest Pocket with Drain Holes and Gear Loop Side Slits with Drop Tail Hem Rod Holder Specs 87% Polyester, 13% Spandex Machine wash cold with like colors, close hook and loop tape before washing, only non-chlorine bleach when needed, tumble dry low, remove promptly, cool iron if needed Sizing and Fit Model is 5'2" and 116 lbs. She is wearing size Medium. Relaxed fit for extra comfort and mobility, if you think you are between sizes best to buy the smaller size.