Sockwell Men's Circulator Compression Socks, Medium/Large, Bark Solid 32% Merino Wool/32% Stretch Nylon/31% Bamboo Rayon/5% Spandex Moderate (15-20mmHg)-recommended for all day, everyday; Ideal for prolonged sitting, standing, flying and travel, minor swollen/tired feet and legs Seamless Toe Closure for Fit and Comfort Arch Support offers a Comfort Fit and Helps Keep the Sock In Place Spandex Throughout the Sock Great for Recovery from Exercise