Slipperooz by Deer Stags is collection of indoor-outdoor slippers made with a patented S.U.P.R.O. sock technology, slip-resistant rubber soles and warm synthetic linings that deliver superior comfort. The S.U.P.R.O. sock or "Super Underfoot Pedorthic Radical Orthotic" is a Deer Stags patented technology used on the Slipperooz to provide the ultimate comfort footwear system through the use of a thick, EVA orthotic sock. This revolutionary orthotic cradles your foot in contoured padding and provides excellent shock absorption where your feet need it most, your heel and forefoot. Wear a pair of Slipperooz slippers and your feet will be swimming in comfort.