When you demand the best, the Combat Boot 3-Pair Pack by Thorlos is the mobility enhancing pair of socks you'll need to maintain top condition during a demanding day field training. Sold in a 3-pair pack. Crew sock length sits at calf. Spandex collar helps hold them in place all day. THORâ¢LON construction provides amazing resilience, durability and moisture wicking. Thicker cushioning in the ball and heel offer maximum shock, impact, shear and blister protection. Moderate cushioning located in the shin and instep help protect against abrasion and boot pressure. Moderate cushioning in the arch offers a better fit and comfort. Materials: 86% THORâ¢LON acrylic, 13% stretch nylon, 1% spandex. Machine wash warm, do not bleach and tumble dry low. Made in the USA. Made in the USA.