Cura-Heat - Arthritis Pain Refill contains 6 heat packs which each provide up to 8 hours of pain relief for the knee or wrist. To be used together with the Cura-Heat elasticated wrap. Very easy to use, these heat packs pr instant relief for your arthritic wrists or knees which lasts for up to 8 hours. There is no need for any preparation, the packs are air-activated and will omit heat after opening of the sachet they come in. Product Features To be used in conjunction with Cura-Heat elasticated wrap Pr s up to 8 hours of pain relief Very easy to use - ideal for on the go Not suitable for children