Canadian made socks using all Canadian Fibre. Our most popular sock! Constructed with warm plush terry around the bottom of the foot, and designed to fit at a mid calf height. Extremely warm and durable, it is an excellent option for anyone who spends time outside in the winter. 70% alpaca for softness and warmth, 30% nylon/spandex for structure and a comfortable fit. These socks have extra nylon woven into the toes and heel of the sock for extra durability in work and hiking boots. Medium fits womens 6-9, mens 6-8.5. Large fits womens 9.5-12, mens 9-12. Extra Large fits mens 13-16. Please note that colours may not always be exactly as shown in the picture, as the alpaca fibre is always undyed which means that each batch is slightly different.