The fender holster utilizes a high denier yarn to create a heavy fabric designed for industrial applications. The solution-dyed polyester with a fluorocarbon finish is water repellant. The fabric provides superior strength, abrasion resistance, dimension stability and UV resistance. Due to the weave and finish, it is mildew resistant and does not noticeably shrink, stretch, or sag. The outer layer of the Fender Holster is made from an extremely durable and protective plush polyester fabric. The soft material is intended for use against gel coat and other hard coated surfaces. It will not scratch your boat.