These mid weight mid length waterproof socks from sealskinz are a calf length medium weight sock with a merino wool loop pile lining for warmth and excellent wicking performance these socks are suitable for a wide range of outdoor activities all sealskinz socks incorporate unique seamless close fitting three layer technology which reduces friction between the foot and shoe providing in built blister reduction the close fitting inner actively wicks sweat and moisture away from the skinnbs