In addition to our electric amethyst mats, we also offer non-powered mats without an operational heating system. Some customers use these mats as carpets to cover the entire floor in a child's room, or at least the bed, to protect against electromagnetic fields or radiation from underground water sources. These mats utilize the body's natural heat to produce FIR rays, providing the therapeutic benefits of pure and natural amethyst. When disturbed by body heat or pressure, negative ions are emitted naturally by crystals. These ions are more easily absorbed by our bodies than those generated by air ionizers. Other ways to use non-powered mats include those prohibited for electric ones. • to bend, wrap and cover your body • for children to play, step, dance, run, train, or for children's entertainment • for practicing active yoga exercises  • for underwater, in-pool use • to use on a car seat (if the seat is heated, the heat will be converted to FIR by the mat) • Some of our customers even buy such unpowered mats for pets. Cats love them!