Tranquility® Heavy Duty Underpad, 30 x 36 Inch, 1 Bag of 10 Cleaning Aids 13 ounces of white petrolatum 416700 13 ounces of white petrolatum * Square toe design acts as a bumper to protect the toes when k wires are present and provides better left right fit * Ankle strap seats foot firmly in shoe to reduce heel slippage and eliminate friction * Removable forefoot closure provides security while eliminating buckle pressure * Zoned outsole has an aggressive tread under the mid foot where traction is needed most * Removable Insole features twice the padding of standard insoles and can be modified as needed Provides 7½ square feet (30 x 36 inch) of protection and can absorb up to 1 quart of fluid Extra strong