Cura heat arthritis refill packs help to deliver deep comforting heat for up to 8 hours it helps to deliver heat therapy in an easy to use format and works by increasing blood flow to the source of pain to relieve the pain and aches associated with arthritis in the joint area unique design this patch has a thin discreet ready to use design making it ideal to use anywhere also it is portable and can be carried anywhere this product is fragrance free and non medicinal how it works it c