Yacht & Smith 12 Pairs Of Mens Black Dress Diabetic Socks, Cotton Blend, Sock Size 10-13 8% spandex 80 % Cotton 12 % Poly 8% Spandex, Extra Thin Sock, Not A Sweat Sock Sockbin is the only authentic seller of Yacht & Smith socks Sock Size 10-13 fits men's shoe size 8-12, Loose Fitting Top Yacht & Smith is a USA registered trademark. Please make sure that you received item(s) from Yacht & Smith. For Diabetic circulation problems - Edema - Neuropathy