Sockwell Women'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 prevents slippage and ensures a snappy fit throughout the day