Cura-Heat - MAX are maximum sized heat patches, providing up to 24 hours of targeted pain relief to a large area. The patches are especially well-suited to provide relief from acute back pain. Twice the size of the regular heat patches, this product will ensure maximum coverage to relieve acute back pain. The patches are very easy to use and are to be used over clothing or underwear, not directly onto the skin, where they will deliver up to 24 hours of pain relief. Product Features Pack contains 2 heat patches Air activated patches - providing quick relief Fragrance free and non-medicinal