This cover-up provides next-to-skin comfort on the boat and beyond with special fabric that enables heat release as it wicks away sweat. UPF 50 sun protection blocks out harmful UV rays. Made for summer style, this casual cover-up is part hoodie and offers excellent cool summer protection. Omni-SHADE UPF 50 shielding works to block harmful UVA and UVB sun rays, while the Omni-WICK and Omni-FREEZE ZERO tech provides super cooling, wicking action. It works to pull perspiration away from the skin, keeping you dry and extra cool on the hottest of days. Columbia offers this casual cover up in multiple colors and sizes. Relaxed Fit. To ensure the size you choose is right, utilize our sizing chart and the following measurement instructions: For the chest, measure at the fullest part of the chest, under the armpits and over the shoulder blades, keeping the tape measure firm and level.