"Full Description:\nWe took our original waterproof socks and beefed them up to help you take on the coldest and wettest weather. Cold and wet feet can lead to all sorts of not-so-good things outdoors, including numbness, blisters, frostbite, and worse. Our Waterproof Extreme Cold Weather Mids will keep you dry and warm during frigid stream crossings, on blustery cold and rainy days, through icy terrain and deep snow, and even standing in cold leaky waders. With this kind of warm and waterproof protection, you'll wish you had them sooner. We pioneered the use of a unique hydrophilic membrane that's 100% waterproof yet pulls moisture away from your skin at the molecular level -- keeping you dry and cool all at the same time. And with a Hydrostatic Head of >20,000mm, our socks stay waterproof under the toughest of conditions. Material: Our 100% waterproof socks are constructed using premium materials and by bonding three layers together to make one highly waterproof and breathable sock: Outer Layer - 90% Nylon, 10% Elastane Middle Layer - 100% Hydrophilic Membrane Inner Layer - 41% Merino Wool, 41% Acrylic, 14% Polyester, 2% Nylon, 2% Elastane Care: We don't like complicated things. And when it comes to the care of your socks, we want to make it as simple as possible. This is the type of sock you can throw in the wash along with the rest of your gear. No need to line dry or wash with special detergents. Since the membrane is a solid barrier, you'll never need to re-waterproof. Wash at 40ºC/105ºF Low Tumble Dry or Drip Dry Do Not Dry Clean, Iron, or Bleach \n\nFeatures:\n\u003cul>\n\u003cli>Handmade & Hand Tested: Exclusively handmade in the UK to our unrelenting standards and attention to detail, every single sock is hand-tested for waterproofness.\u003c/li>\n\u003cli>Extemely Breathable: Particularly noteworthy is the unmatched breathability of the hydrophilic waterproof membrane to release perspiration steam and warm air from inside the sock. This creates a high level of comfort for the wearer, even while performing strenuous and aerobic activities, while also preventing rain, mud, and sand from getting inside the sock.\u003c/li>\n\u003cli>Built for Extreme Temps: Crafted with the thickest insulation, this sock is ideal for extremely cold and wet conditions where thermal retention is imperative. Using a three-layer bonded construction, a 100% waterproof hydrophilic membrane is sandwiched between a premium Merino wool interior for warmth and a durable nylon exterior with 4-way stretch lending to great fit and wearability.\u003c/li>\n\u003c/ul>\n\n"