Battle the toughest crawlways in these Dirty Daves Elbow Pads. They are constructed of all nylon components with a 1000 denier nylon rash gaurd for exceptional durabilty where its needed most. All seams are blind stitched for longer stitch life. The inside padding is a rugged 3/8 inch neoprene rubber. To ensure great positioning they have an elastic cord on each side internally to keep them cupped and in place. The closure system is two 2 inch elastic/velcro straps that double back on themselves for a wide variety of fit. Another great thing about the Dirty Daves Elbow Pads is that they can also double as children knee pads for those little guys and gals that tend to follow in their parents footsteps from time to time.