Therapy Heat Wraps turn up the heat on your muscle pain,in shoulder,wrist and neck .THERMACARE 16HR NECK.WRIST.SHOULDER,Therapy HeatWraps turn up the heat on your muscle pain,in shoulder,wrist and neck . Delivers up to 16 hours of pain relief (8 hours while you wear it and 8 hours after you take it off). Targeted heat cell placement stays close to your skin, providing heat exactly where you need it. Larger adhesive area makes it easy to readjust. Single-use wraps are thin enough to be worn discreetly under clothing.