●Material Composition: 100% Polyester ●【UPF 300 Anti-UV Protection】With UPF 300 protection, the arm cooling sleeve blocks over 99% of harmful UVA and UVB rays. So you wont get sunburn or mosquito bites while you are outdoors ●【COMFORTABLE COOLING AND MOISTURE WICKING 】 This UV resistant sunsleeve is made of a cool, cold fabric that is lightweight, breathable and wicks away sweat. The fabric actively wicks sweat and provides a cooling effect. Therefore, these sunscreen sleeves will not only protect you from the sun, but also help keep you cool in the midday sun ●【One Size Fits Most】Sun protection sleeves are unisex and durable, stretchy to fit any size arm from men to women ●【ERGONOMIC DESIGN】This compression arm sleeve is ergonomically designed to protect your muscles and calm your arms during intense exercise or physical work ●Ideal for Outdoor Activities: Golf, cycling, fishing, driving, jogging, climbing, boating, gardening, basketball, tennis, etc. You can even wear them in an air-conditioned office to keep your arms warm