The idea for this long arm cover came from the traditional hand covers used in Japan. However, whereas traditional arm covers only partially cover the back of the hand, Montbell's Cool Shade Cuff Arm Cover provides total protection while leaving your hand free to perform complicated tasks. The hand cover has a plastic insert to help it keep its shape and the material has excellent breathability and wicking, quick drying abilities, helping you keep cool and dry. In addition, a photocatalytic treatment provides long term odor control. Use the elastic at the top of the gloves as a simple way to adjust fit.