These hike socks? They're made out of old hike socks. Yep, the Smartwool® Hike Classic Edition Light Cushion Second 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. It features crew length, pull-on style, two cut yarn, and virtually seamless toe technology is a flat knit toe seam designed for additional comfort.