The SealSkinz Waterproof Cold Weather Mid length Sock is a 100% waterproof, windproof & breathable mid length sock. These Waterproof Cold Weather Mids will keep you dry and warm in leaky waders, through stream crossings, and in rain, snow, and mud. Around the clock protection, Sealskinz thinks that every person should keep a pair in their pack - just in case!SealSkinz Waterproof Cold Weather Mid length Sock FeaturesDesigned to Keep You Warm and Dry - These 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