Sockwell Women's Orbital Stripe Graduated Compression Socks 34% Merino Wool, 34% Bamboo Rayon, 28% Stretch Nylon, 4% 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 Nurses, Pregnant Mommies, Sports, Running. Improve your performance and stamina with the best fitting compression sock on the market. Soft roll top for extra comfort. 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