65% Alpaca for warmth & comfort. 30% Wool for wicking, memory & dry time. 5% Hemp for strength & durability. Large- fit up to a mens 13. Medium fit up to a ladies 10, mens 9. Small fit up to a ladies 8. Childs - fit up to a childs size 4. *For sizes in between a cutting template can be found on the inside of the label*. Please see our 'insoles' page for more information or contact us for wholesale details.