Yacht & Smith 12 Pairs of Mens Cotton Thermal Socks Hiking Camping Hunting Outdoor Socks 5% spandex 70% Cotton 25% Acrylic 5% Spandex Sock Size 10-13 fits men's shoe size 8-12 Thermal Insulating, Keeps Heat Close To Body, Heel forms naturally Extra Cushion & Arch Support, Reinforced for extended wear Yacht & Smith is a USA registered trademark. Please make sure that you received item(s) from excell. If not, please report to Amazon. Thanks.