Mattress OverlaySleep well with soothing Welltex technology. Can be used as a mattress pad under a thin sheet or as a thicker blanket. It helps regulate body temperature for a more comfortable sleep. Welltex technology can also help relieve back pain, stiffness, inflammation, rheumatism and osteoarthritis. Welltex absorbs and emits the infrared energy (FIR) that constantly radiates from the body. When the FIR is reflected back into the tissues, the beneficial effect