The original waterproof sock that started it all. Using our three-layer Aquasealz technology, it's an ideal choice when there’s a risk of getting your feet wet while cycling, commuting, hunting, working outside, fishing, or hiking. 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. 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. Designed with a seamless construction including hand-linked flat toe seams and the addition of elastic support on the ankle, heel and instep, you won’t notice the seams but will definitely notice the extra comfort and fit. Exclusively handmade in the UK to our unrelenting standards and attention to detail, every single sock is hand-tested for waterproofness. Machine washable. 90% Nylon, 10% Elastane.