The warmest, softest, longest most durable alpaca wool socks we've ever produced. Cushion looped, a fantastic fit and very durable. Great in Hiking or Wellington Boots, or lounging at home. Please note they are 50cm (over 20 inches) from heal seam to top (Model pictured is 5'7" tall). A gentle elastication around the arch of the foot ensures that they won't slip down inside your boots. Made with a supersoft Baby Alpaca wool blend. One Size: 37-41 (UK size 5-8) (US Size 6.5 - 9.5) See larger size Men's Country Knee Socks. https://www.faire.com/product/p_skdhay7umk STYLING TIP: Wear them wrinkled down for a more chunky leg warmer look! They contain the necessary amount of elastane and nylon to make them last. 45% Baby Alpaca, 40% Acrylic, 15 % Nylon. A higher ratio of alpaca would not be as durable. Our Long Alpaca Socks wash beautifully on a 30° C / 86° F gentle machine wash, but best to do so in a gauze laundry bag, and do not spin or tumble dry. Lay flat on towel to dry.