Stay comfortable no matter how long the OT is with this Thorlos 12 Hour Shift Over Calf 3-Pair Pack of socks. Crew socks that sit at the calf. Sold as one-pair pack. Maximum Cushioning Provides exceptional cushioning and protection for long days on your feet. THORLON fabric THORLON fabric provides superior softness and durability. Moisture-wicking technology helps the fabric dry quickly. Compression throughout helps reduce fatigue and keeps the blood flowing. Integrated venting enhances moisture portability. Flat knit arch provides a better fit and more support for all day comfort. Low profile toe closure lies flat to reduce chafing and has minimal bulk. 69 percent THORLON acrylic, 19 percent nylon, 8 percent elastic, 4 percent polyester. Machine wash, tumble dry. Made in the USA.