The grounding fitted sheet is a simple and effective grounding method. Using it is like walking barefoot on the grass, continuously transporting the earth's energy to the body. There are many benefits of grounding, including eliminating static electricity, improving sleep, reducing stress, quick recovery. The grounding fitted sheet is very simple to use, you can spread it on the mattress like a normal bed fitted sheet, then snap the grounding connection cord onto the metal stud on the side of the grounding fitted sheet black conductive leather, and plug the other end of the ground wire into the grounding jack of the wall outlet. The grounding fitted sheet can be machine washed, and liquid detergent can be used, but please do not use bleach/fabric softeners/whitening detergents or oxi-detergents. It can be line dried or dried in a dryer on low, but not at high temperature. The following is the grounding test method, it is not necessary, you can try it if you are interested. Step1: Prepare grounding fitted sheet, connection cord, and multimeter (it is not included in this grounding products set). Step2: Adjust the multimeter range over to 200 kiloohms (this step is very important, if the range selection is wrong, the multimeter reading will be 0). Step3: Measure both ends of the connection cord with the multimeter. If the resistance is 100 kiloohms, it means that the conductivity is normal. Step4: Snap the connection cord onto the metal stud on the grounding fitted sheet. Then connecting one end of the multimeter to the connection cord plug, and the other end to the silver fiber on grounding fitted sheet. If the multimeter shows a valid reading, it indicates that the conductivity of the entire grounding sheet is normal.