Lightweight shirt with Scent-Factor Scent Inhibitor Technology and Solar-Factor UPF 40+ UV Protection to keep you undetected and protected from the sun year round. Solar-Factor UPF 40+ UV Protection Scent-Factor Scent Inhibitor Technology Soft and Comfortable Polyester Fabric Dual Chest Pockets and One Zipper Chest Pocket 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.