Fabric type 85% Nylon, 15% Polyester Copper fibers is a high performance materials, Copper is essential to your health,best copper embedded fibers pulls the electricity from your body to relieve your pain and allows you to heal.They keep your feet and legs fresh throughout the day by providing a mild squeezing action to support enhanced Increase circulation. These offers the most perfect settlement scheme for those who sit for long period during travel or at work or even while sleeping. More improve circulation means more Healthier legs and less pain+swelling.Our Graduated Compression Socks put pressure in just the right spots.Provides true graduated compression to support your legs, reduce fatigue,soreness,and prevent injuries at the same time.Progressive compression technology has been recognized by many users Our copper compression socks is self-care staples. • HIGH PERFORMANCE+YOU CAN WEAR IT EVERYDAY- We pride ourselves on comfort .Our products feature a unique copper- infused,breathable,moisture-Breathable high performance fabric maintains an optimal temperature and moisture for maximum level of comfort. Ensure your feet and legs remain cool in the heat, and warm in the cold. Comfortable wide top band prevents rolling, delivers 360-degree stretch for greater flexibility and durability,gives you compression without sacrificing comfort. See size chart in pics. These are in brand new condition worn once selling because I wanted ones that covered the knees.