These hike socks? They're made out of old hike socks. Yep, Smartwool's 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. Design: Featuring our 2nd Cut(TM) yarn - utilizing a mix of 50% recycled fibers from a combination of our sock take back program, canister waste and 50% virgin Merino wool to create new socks Virtually Seamless(TM) toe technology is a flat knit toe seam designed for additional comfort Additional Details Made in United States Of America: 39% Wool-Merino 32% Unknown Fiber Content/Mixed Fibers 28% Nylon 1% Elastane Full Cushion: Medium thickness with full sock cushioning