Fast acting heat pad with direct to skin application, provides 6 hours of pain relief. Pinpoints soothing heat directly where you need it the most. Exclusive formula works with your own circulation to spread the warmth. Air-activated, odorless and non-medicated. Product is supplied as a pack of 3 treatments, 6 shrink-wrapped boxes (18 treatments) and a case of 24 boxes (72 treatments). Pad measures 5" x 5.25". Disposable, single use only.