This grounding kit includes a 54" x 71" grounding mat, 15 foot grounding cable, grounding instructions, and color box. It is made of 100% Highly-conductive PU carbon leatherette with breathable holes and elastic straps for mattress attachment. Grounding can reduce stress, pain, and improve sleep, energy, and blood flow. Simply place the leather-like side up, and the other side down. Connect the cable to the connector and socket on the wall. For optimal results, use regularly. Wipe clean with a wet cloth; do not use bleach or natural oils. Leather taste is normal and will dissipate with natural ventilation.