Pantherella Earlham Merino Wool Blend Mid Calf Mens Dress Socks Merino Wool, Nylon 70% Merino Wool, 30% Nylon Blend Comfortable mid calf length Reinforced, fine linked toe for seamless comfort and durability. Plain foot bottom for added comfort Mens sock sizing: Medium fits 8.5 -11 foot, Large fits 11.5 - 13 foot Made in England by Pantherella, the premier hosiery and sock brand since 1937