Tommyco EXT707 Injected GEL Knee Pads With Sewn On All Terrain Cover Jersey Cloth with EVA+pu foam and injected gel Imported Made with 100 percent injected GEL and PU foam Cover identical to the GEL707 except that the all terrain cover is sewn on The bottom strap is a wide lycra elastic with a hook and loop fastener The extended heel on cover allows user to sit back on heels while working, distributing the body weight evenly which helps eliminate back problems