Sockwell Men's Incline Quarter Graduated Compression 32% Merino Wool, 32% Stretch Nylon, 31% Bamboo Rayon, 5% Spandex Made in US Moderate (15-20mmhg) graduated compression recommended for Biking, Hiking, Walking, and Running. Minimizes swelling of the feet and ankles. Perfect for flight travel, and when you are on your feet for long periods of time. Low profile design still Promotes circulation, minimizes swelling, and helps reduce fatigue Size Medium/Large fits US shoe size 7-10, Size Large/X-Large fits US shoe size 10.5-13. Ultra Light cushion sole provides comfort and has a Seamless Toe closure. Offers arch support, turn welt top and seamless toe closure with reinforced Toe and Heel Box helps keep the sock in place throughout the day