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 4 treatments 6 shrink wrapped boxes 24 treatments and a case of 48 boxes 192 treatments. Pad measures 2.75 x 3.75 . Disposable single use only.