Wigwam Mens Hot Weather Bdu Pro Sock 47% Dry-Release, 24% Stretch Nylon, 21% X2o Acrylic, 7% Cotton, 1% Spandex Made in US Machine wash Taller boot sock with foot hugging fit Patented moisture control system featuring dry-release keeps feet dry in warm weather Natural chitosan in x2o acrylic protects sock against odor and bacteria Cushiony all overfor comfort Breathable mesh instep