Constructed from rugged1,000 denier texture with inner pvc coated and superior insulated zippers, the Kupo waterproof armsleeve can helps to repel the waters and agaist stand/ dust for you valued arm with the two section covers. The velcro to open and close the cover in the front for easy access to the arm post. A small zipper is also swen on the side of sleeve that allows you to directly access for a quick tension adjustment. A must for rain, dust, stand and sea water environments