These hike socks? They're made out of old hike socks. Yep, our Hike Classic Edition Full Cushion 2nd Cut Crew Socks are made with a mix of recycled fibers, canister waste, and virgin Merino wool for a pair that feels good and does good with every step. Plus, the full cushioning helps add extra warmth, durability, and protection, making them the perfect pick for colder weather hikes.Smartwool Mens Hike Classic Edition Full Cushion 2nd Cut Features: The original performance merino sock since 1994 Featuring our Second Cut™ yarn Virtually Seamless™ toe for enhanced comfort Merino wool helps manage moisture, regulate temperature, and resist odors. 33% Merino Wool, 33% Unknown Fiber Content/Mixed Fibers, 33% Nylon, 1% Elastane