The Pit Pillow features Smart Mat Technology and has Velcro on all sides, so that several can be connected end-to-end, side-by-side or stacked vertically. The Velcro also allows the Pit Pillow to connect to our other mats or the Air Floor. Convenient handles are located on the side and ends of the mat. (It is not intended for use alone on hard surfaces.) The Pit Pillow may also be used as a "throw mat" for a trampoline. It is great in a loose foam pit to prepare an athlete for a slightly firmer landing.This extra soft mat has a denim cover and very low density foam. It is designed to be used as a top mat in a loose foam pit or as a top mat on another foam or air-filled mat when used outside a pit.