The CEP Arm Cooler Sleeves help to enhance the body's natural cooling system, as well a protect you from the sun. These are non-compression sleeves. Their Cool-cell technology increases the surface area for cooling, lowering your skin temperature by up to 6 degrees. To protect from the sun the Cooler Sleeves have UPF 50 protection. Their convenient design means they can be easily removed removed and stored if the temperature changes.