Cura-Heat Arthritis Pain for Knee is a self-heating system which stays in place over the knee area delivering deep, comforting heat for up to 8 hours to provide targeted, temporary relief to arthritis pain. With no need for preparation, just open the Cura-Heat sachet and insert the heat pack into the wrap pockets. The comforting heat can help relieve the pain and aches associated with arthritis in the joint area by increasing blood circulation. Non-medicinal, portable and discreet, they are ideal to use wherever you are. Available as a 4 pack with one knee wrap included.