At Sockwell, we stand for wellness. We’re passionate about crafting the world’s best socks, with no compromises, so you can feel better in style every day. From compression socks to relief solutions to essential comfort, we bring therapeutic solutions and fresh modern styling to every sock we make. Made in the USA, our socks are consciously crafted with American wool-based yarns, like our Fine Merino Wool/Rayon from Bamboo and Fine Merino Wool/Alpaca blends, blending durability and thermoregulation with environmental friendliness. Feel better in style with Sockwell socks!SIZES: Size Medium/Large fits men's US shoe size 7-10, Size Large/X-Large fits US shoe size 10.5-13. Sock length fits over the calf. HIGH PERFORMANCE YARNS: Provides natural moisture management, odor control and thermoregulation. COMFORT & PERFORMANCE FEATURES: Accu-fit Technology, Graduated Compression, Turn Welt Top, Arch Support, Seamless Toe Closure, Ultra Light Cushion Sole. 4 ZONES OF FIRM (20-30 mmHg) GRADUATED COMPRESSION: helps to minimize swelling, reduce fatigue, stabilize muscles, and provide plantar fasciitis relief. Energizes legs and feet. RECOMMENDED FOR: All day/everyday wear, flying and travel, prolonged sitting or standing, exercise, recovery, and pregnant women. Ideal for those who work in professions that demand prolonged standing: nursing, healthcare, retail, or even construction. Machine Wash. Made in USA. 31% Merino Wool, 31% Rayon, 30% Nylon, 8% Spandex.Best Sellers Rank: See Top 100 in Clothing, Shoes & Jewelry. : B008338K1M. Manufacturer: Goodhew. Date First Available: May 1, 2012. Department: Womens. Item model number: SW4M. Package Dimensions: 14.21 x 7.95 x 2.83 inches; 4.27 Ounces.