THE THERAMAT MATTRESS PAD IS HAND-CRAFTED IN KOREA with the finest materials and most advanced components. Continuous heat sensing technology and an automatic 10-hour shut off period ensure the ultimate in sustained and comfortable sleep. ELECTROMAGNETIC FIELD (EMF) SHIELDING TECHNOLOGY eliminates up to 99% of harmful EMFs. Shield Life's patented EMF Shielding technology allows for a maintained and rejuvenating night's rest. FAR INFRARED (FIR) HEAT AND NEGATIVE IONS generated by the TheraMat maximize comfort. Through absorption of FIR heat, muscle tissue is safely and gently stimulated to bring you to a new level of wellness. CAUTION MEMORY FOAM OWNERS - Do not use heated mattress pads with any memory foam mattress, unless you use proper insulation like ShieldLife's 100% Cotton TheraMat Cover. Do NOT use the Shield Life TheraMat on or below any natural or man-made latex or foam bedding.