Boot length and with a dense, resilient terry cushioned footbed, heel and ankle, Bridgedale 100% Waterproof Mid-weight Boot StormSocks create a balance of warmth and breathability ideal for outdoor activities. At the important next-to-skin Layer is a terry knit merino wool rich inner. Merino is known for its odour-resisting antibacterial nature, and ability to wick moisture keeping your feet warm, dry and comfortable.The outer layer is made from tough nylon, protecting the special Hydrotech waterproof breathable membrane against damaging abrasion. All three are bonded by a clever matrix lamination process that ensures they have class-leading stretch built right in, along with a performance fit that, together with the flat toe seam and elastic arch support, keep the sock in place. Sitting above the top of standard walking boots and covering the leg to mid-calf these waterproof socks, combined with waterproof trousers or gaiters will stop water ingress.