Sockwell Men's Concentric Stripe Graduated Compression Socks 33% Merino Wool, 33% Bamboo Rayon, 28% Nylon, 6% Spandex Made in US Moderate (15-20 mmHg) Graduated Compression is Recommended for: All day wear and is helpful for those who are Flying and Traveling, Prolonged sitting or standing, Exercise and recovery. Minimizes or eliminates swelling of the feet. Reduces Foot Fatigue Promotes circulation, minimizes swelling, and helps reduce fatigue- Perfect for Work, Sports, Running. Improve your performance and stamina with the best fitting compression sock on the market. Sock length is over the Calf of your leg. Accu-fit technology consisting of spandex throughout the sock ensures same fit at the end of the day as when it was first pulled on. Light cushion sole provides comfort and has a Non-abrasive Seamless Toe closure. Size Small/Medium fits US shoe size 4  7.5, Size Medium/Large fits US shoe size 8 - 11 Offers 4 zones of graduated compression starting at the ankle and moves up the leg which keeps your toes comfortable without feeling any pressure 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