Thermal Tech Socks Warm, breathable moisture-wicking knit fabric Nostatex?(R) silver yarn sole for wicking moisture away from the skin and giving an anti-bacterial, odor-free layer that conducts heat uniformly around the skin surface to reduce hot spots Ribbed design reduces bunching at the heel and ankle and increases riding comfort Knee-length design for coverage and comfort BASE COLOR Black| Gray COLOR/FINISH Black| Gray DISPLAY COLOR/FINISH Black| Gray EU SIZE 36-41 FIT Knee-High MODEL Thermal Tech PRODUCT NAME Socks SIZE S/M TYPE Long UNITS Pair US SIZE 6-9