Alpaca Knee Length Socks - BiscuitThe warmest, softest, longest lasting alpaca socks. They are cushion looped, a fantastic fit and they won't wear out like 100% baby alpaca. A gentle elastication around the arch of the foot ensures that they won't slip down inside your boots or shoes They contain the necessary amount of elastane and nylon to make them last. 45% Baby Alpaca, 40% Acrylic, 15 % Nylon. A higher ratio of baby alpaca would not be as durable. One Size Only: Fits size 7 10