The Elastogel Hot/Cold Shoulder Sleeve is perfect for the hard to treat contoured areas of the shoulder, upper and lower arm, upper chest and upper back areas. Used to offer hot or cold therapy to either the left or right shoulder. The tough, flexible gel will not leak if punctured and the 4-way stretch material will help ensure product durability and effective therapy and pain management. Like the other Elasto-Gel products, this can be put in the microwave for heating or in the freezer for cooling. Stays soft and pliable, even at -20 F. Provides 20-40 minutes of treatment per application. Available in 2 sizes. Normally for home use.