Materials:nylon Color:Black/tan Size: XS:Calf:4-6 S-M:Calf:6-8;ankle:4-6 L-XL:Calf:9-11;ankle:6-9 XXl:Calf:10-13;ankle:8-10 Graduated Compression improves circulation for fresher feet and legs throughout the day or in flight comfort. Provide mild squeezing for warmness and enhance blood moving through your legs. Easy to wear and as thin and discreet as trouser socks, our light, soft unisex socks keep you dry and comfortable even with long use and make it easier to be worn all day throughout the night. Cushioned toe and sole beds for shock absorption With their gradual compression our socks are ideal for those who sit for long period of time during travel or at work, or even those standing on their feet all day when decreased circulation can cause swelling and fatigue.