Stanfields Merino Blend Trail SocksThe yarn blend in this sock was created with the activity level of hiking in mind keep dry, stay warm and comfortable. Merino wool is a natural, breathable fiber and helps to keep feet warm even when they are wet, polypropylene is water resistant, nylon adds durability and spandex adds comfort with stretch. Wool is naturally odor resistant Articulated arch support Cushioned heel and sole 40% Merino Wool 40% Polypropylene 15% Nylon 5% Spandex Made in