Product Description Heat when you need it at a click of a button, Simply Click the metal disc and a chain reaction takes place producing heat! Excellent for Muscular Pain, Outdoor Activities, Aches and pains, poor circulation and Sports Injury's High Quality packaging with full instructions Usable 1000's of times!! Simply Boil for 5mins in pan of water until the crystals melt and then it's ready for when you need it again
