Made in the USA Single pack sock featuring 70% Ultraspun Polyester / 27% Nylon / 3% Spandex blend with a reinforced toe and heel Embedded arch support reduces foot fatigue and targeting cushioning provides maximum durability and protection Rib stay-up for secure fit Mid-Calf The Bates OTC 1 Pack Sock E11919070-001 is made from a combination of 70% Ultraspun polyester, 27% nylon and 3% spandex for a comfortable fit. These socks have a reinforced toe and heel for durability. The embedded arch support helps to reduce fatigue. This sock is also made in the USA.