Fabric Material: 95% Organic Cotton + 5% Silver Note: The test pen is only used to test whether the product contains silver fibers, and not to test whether the ground wire has been connected. Even without connecting the ground wire, the tail light of the test pen lights up, proving that our product contains conductive silver fibers! HIGH QUALITY MATERIAL: The ground sheet is made of 95% organic cotton + 5% pure silver fiber, which has good conductivity, is very comfortable, soft and high quality, providing the comfort and breathability of organic cotton, for you Brings comfort and health, and improves sleep quality. EASY TO USE: Lay the grounding wire sheet on the bed, clip the grounding wire to the metal stud of the grounded bed sheets, and plug the other end of the grounding wire directly into the grounding port of the wall outlet. Grounding/ earthing fitted sheet connects you to earth s electrons & naturally regulating your body voltage (mV) to a healthier level, increased energy, improved circulation, better sleep quality, less stress, relief of muscle headaches, muscle tension etc,. For all ages, suitable for pregnant women and infants WASHING AND CARE TIPS: The conductive sheets are machine washable. Use warm water and liquid laundry detergent.