With an even lower design, Darn Tough's Top Down socks are like wearing no socks at all. The seamless design now features a silicone-free grip strip, as well as all the durability of the exclusive fine gauge wool blend knitting. The moisture-wicking material also ensures feet stay drier, for the perfect comfort in any season. S (4.5-7), M (7.5-9.5) or L (10-11.5). Darn Tough Women's Top Down No Show Invisible Socks