Beyond Bodiheat Pads

12 hours of pain relief. Soothes and comforts sore, aching muscles. Provides relief for back and joint pain. Easy-on, easy-off adhesive backing keeps the heat where you need it most. Exclusive formula works with your own circulation to spread the warmth. Air-activated, odorless, non-medicated. 3.75 in x 5.125 in (9.5 cm x 13 cm).