Thermophore MaxHeat Plus 14 x 27 Large Jobst Opaque 20 30 Thigh High NOTE: Class II Rx Undercast Padding NOTE: Class II Rx Required The InTENSity IF Combo combines TENS and Interferential treatment giving you the best chance of treating patients that need something stronger than TENS therapy alone * Fits left or right Just hold down or press on for heat and release or press off to cool depending on the style *MaxHEAT Plus units let you add additional water in dry environments * Moisture helps the intense heat penetrate even more deeply relieving pain relaxing muscle spasm and increasing rejuvenating circulation * Two switch options put you in total control of the heat level minute by minute