Tough-1 Revive Cooling Hock Wraps The hyper-evaporative PVA material has the ability to absorb and hold water. Through evaporation the water removes heat from the body and provides a refreshing cooling sensation. Our wraps come with an inner layer consisting of sponge like material which holds even more water providing an extended period of cooling when compared to other brands. Great for post workouts to aid in recovery also use to aid in reducing inflammation from strains and sprains. Sold in pairs.