Thermophore MaxHeat Plus 14 x 27 Large Jobst Opaque 20 30 Thigh High * For patients under 6 MSHQ 1594XL * For patients under 6 33 pounds 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 *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 Just hold down or press on for heat and release or press off to cool depending on the style