100% Polyester lightweight button up fishing style shirt with Solar-Factor UPF 40+ UV Sun Protection is functional and stylish for any use. Solar-Factor UPF 40+ UV Sun Protection Soft and Comfortable Lightweight Polyester Dobby Pongee Vented Cape Back and Shoulders Bellowed Chest Pockets with Drain Holes and Gear Loop Sunglass Holder and Cleaner Rod Holder Adjustable Roll Up Sleeves Specs 100% Polyester 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 5’10” and 195lbs. He is wearing size Large. Relaxed fit for extra comfort and mobility, if you think you are between sizes best to buy the smaller size.