NNS Kwik-Moving patches are quick relief pain patches that utilize body heat activation technology. Each patch measures 6.5*4.2cm and comes in a pack of 20 pieces, designed to provide targeted pain relief through heat therapy for various muscle and joint discomforts. The patches are designed to activate with natural body heat to provide pain relief. Their specific size of 6.5*4.2cm makes them suitable for targeted application on different body areas. The product appears to be aimed at addressing muscle pain, joint pain, and similar musculoskeletal discomfort. As this is a medical/pain relief product, please consult healthcare professionals before use.