The SealSkinz Starston Waterproof Cold Weather Mid Length Sock is 100% waterproof, windproof & breathable mid length sock. The inner lining is crafted from fine Merino Wool to insulate and regulate temperature making this perfect for use in colder weather conditions.SealSkinz Starston Waterproof Cold Weather Mid Length Sock HighlightsWIDE RANGE OF ACTIVITIES The perfect mix of waterproofness and breathability, waterproof socks are ideal for keeping your feet dry and warm while cycling, hunting, commuting, working outside, fishing, or hiking.KEEP YOU WARM AND DRY The cold weather socks are crafted using a three-layer bonded construction that combines a 100% waterproof hydrophilic membrane with a premium Merino wool interior for warmth and sweat-wicking, and a durable nylon blend exterior with 4-way stretch for great fit and wearability ... More info