Our improved model in heavy knit. Sheep and alpaca wool are incredibly warm. Cotton and hemp are notoriously durable. By combining warmth and durability we created socks that could withstand long-wearing while still being all-natural. They contain no synthetic content and the wool is not treated with chemicals making them healthy for your skin as well. Because they are made from completely breathable fibers they don't hold odour or cause you to sweat like synthetics do. COMPOSITION - 45% untreated sheep wool - 25% untreated alpaca wool - 28% unbleached and undyed cotton - 2% hemp WASH - We recommend handwashing to preserve all natural properties of the wool - Do not tumble, dry clean, iron or bleach - Hang to dry