Lightly cushioned for comfort, our Wool Blend Crew Socks are designed for a long life on the trail. They&';re made with Responsible Wool Standard (RWS) wool certified by Control Union (TE-00052557). We blend the RWS wool with nylon and spandex to create a blend that offers exceptional breathability, rugged durability, plus excellent stretch and recovery that lasts the lifetime of the socks. The purchase of RWS-certified products demonstrates demand for better animal welfare practices and responsible land management in the wool supply chain. Product Features: Ultrasoft and Light Fabric - Made from soft and comfortable 100% recycled polyester microdenier fleece Tube Construction - Tube construction minimizes seaming for a more comfortable fit Warm Design - Doubled-fabric construction increases warmth and allows you to turn the gaiter inside out if one side gets wet Unstructured Fit - The loose-fitting, roomy design provides all-day comfort Supporting the People Who Made This Product - Made in a Fair Trade Certified(TM) factory, which means the people who made this product earned a premium for their labor Product Specifications: Fabric: 4.7-oz 100% recycled polyester microdenier fleece with a double-sided, anti-pilling finish. Made in a Fair Trade Certified(TM) factory Weight: 1.7 oz.