Instant Cold Compress - Disposable, non-refrigerated, instant cold compress provides therapeutic cold for recommend time. Instant activation is ideal for emergency situations. Reinforced bag provides extra protection against leaking. Conforms effectively to body contours. Contains: ammonia nitrate and water. Instant Hot Compress - Instant activation is ideal for emergency situations. Reinforced bag provides extra protection against leaking. Conforms effectively to body contours. Temperature ranges from 104 to 113 degrees maximum 30 minutes. Do not place directly on the skin. Cold/Hot Reusable Gel Pack - Reusable and economical, this compress can be used as a cold or hot compress. Its pliable gel formula allows the pack to be conveniently folded in half for application to smaller areas. Unique gel formula remains flexible after freezer storage and can be placed directly into a microwave. Durable bag allows repeated use without leaking.