CCW 300HV Protection Fabrics are extremely tough nonwoven polypropylene protection courses, specifically designed to protect CCW waterproofing membranes. It is a thick nonwoven cushioning fabric that provides the ultimate solution for horizontal applications and is engineered to be placed over CCW MiraDRI 860/861 in horizontal and vertical applications. CCW 300HV is also used as the critical moisture retention element in CCW Green Roof Systems.