ThermaCare Back, 4 Self-Heating Bands, Disposable Therapeutic Heat for Back Pain, 8 Hours Constant Heat

Self-heating bands: soft and comfortable material band with special patented cells that contain natural ingredients that develop heat when in contact with the air oxygen Against muscle pain: effective against muscle and joint pain due to fatigue, muscle tension, sprains, strains, arthritis; suitable for chronic and occasional pain EXTENDED RELIEF: When applied for 8 hours, ThermaCare constant heat gives prolonged pain relief for up to 16 hours PRACTICAL AND COMFORTABLE: Easy to use and comfortable to wear, thin, discreet, odorless; One size fits all for men and women HOW TO USE: Open the wrap when you are ready to use; place on the sore area with the darkest part of the cells facing the skin and fasten the band