Description: ●The compression socks are made of nylon Material, stretchable and greater flexibility and durability. ●Non-Binding , Comfortable, Compression to help Circulation. Reduces Swelling ,relives Tired , Aching legs and feet, Energizes your legs, Smooth Seamless Toe for Comfort Fit . ●Lightweight, Cool Dry and Breathable, keeps an optimal temperature, maintain joint stability regardless of activity. ●Moisture-wicking design to keep feet dry, Reduced risk of injury to the feet. ●Stays in place and does not slide down. ●Retains shape even after multiple washes. Specification: Color: Black Material: Nylon Size: approx. S/M: 54.5 x 8CM/21.5 x 3.1 inch L/XL: 56 x 9.5CM/22.0 x 3.7 inch Package Includes: 1 Pair Knee High Compression Socks(4 Pack) Note: -Please allow 1-3CM differs due to manual measurement. -Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.