(Alpharma) Use the Extend-A-Cool System anytime, anywhere for up to six hours to prolong your cooling therapy. No freezing or wetting required. Cools the area by as much as 6 degrees. A great substitute from cold water hosing liniments and poulticing. Contains 4 cooling sheets (in two cooling sheet packages) and 2 mesh wraps. Provides everything needed to use the Extend-A-Cool System for relieving sore shins, inflamed leg muscles and tendons, or to help reduce swelling and discomfort resulting from acute sprains and bruises.