Our Grounding sheets are composed of 95% premium natural cotton and 5% silver fibers, designed to provide an exceptional sleep experience by effectively enhancing grounding. Should you have any inquiries, our customer service team is available for assistance at all times. Package Included: 1 Grounding Sheet + 1 Grounding Cord (15ft) Washing Instructions: The sheets will shrink by 4%-6%, because the sheets are pure natural fabrics, and pure natural fabrics will definitely shrink. This is normal. Adding anti-contraction agents can prevent shrinkage, but we don't do this because it can be harmful to your skin. The sheets can be machine washed with detergent but must be dried at low temperatures. High-temperature drying is not recommended.