Therapeutic Compression Knee High Sock from Benefeet. Features high performance compression improves leg health and energizes legs, light weight construction with ventilation panels to promote breathability, targeted compression wraps around the arch and ankle for extra support, the heel and toe areas have a ‘’y’’ shaped pocket, that creates a contoured fit, reducing movement and improving comfort, the foot bed is anatomically shaped to fit the left and right foot for ultimate comfort and support, the flat toe seam reduces the risk of skin irritation, high filament nylon yarn is used for durability and moisture control. Made from 85% Nylon and 15% Elastane.