Healthyline Portable Heated Gemstone Knee Pad InfraMat Pro The heated knee wrap is a thoughtfully crafted far-infrared gemstone heating pad that incorporates an advanced carbon fiber heating system and natural gemstones to release deep penetrating far infrared heat into a knee. It is designed to be portable bringing muscle relaxation and temporary relief of joint pain, tension and stiffness on the go or in your home whenever you need. The product's maximum temperature is reached within approx.