Dexshell Trekking Waterproof Socks (Small (USA 4-6)) Waterproof and highly breathable Moisture wicking performance inner Mid weight Merino wool terry loop cushion pad running from toe to heel up to calf This is a mid calf length, mid weight merino wool terry loop sock. Suitable for trekking, hiking and activities in arduous wet environments where there is a need to keep your feet from feeling cold and clammy.