Reusable Heavy Duty Cold Pack Round 10 Black Urethane Hot and or Cold Therapy Wraps Size: Small 416700 Size: Small Nonsterile gauze sponge Provides up to 30 minutes of cold therapy * Clay inside urethane outside *Institutional grade packs are made of durable heavy duty urethane exterior which can be chilled to a lower temperature than other packs and a bentonite clay interior * Chilled pack should be wrapped in towel before applying to treatment area * Notice to California Consumers: WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm *