Just like the great outdoors, these hiking socks are anything but predictable. They’re partly made with leftover Merino Wool from our many past collections, which we blended with more Merino Wool, nylon, and elastane. Repurposing these leftover yarns is a technique we learned from our friends at Cotopaxi—it not only keeps perfectly good materials out of landfills but also creates unique color combinations. You won't know what color your socks are until they're in your hands, but once you get them, you can expect the same moisture management, softness, and support our hiking socks are known and loved for. One Purchased = One Donated. For every pair of Bombas socks purchased from this collaboration, a pair of Bombas donation socks will be given to organizations committed to ending homelessness, like Community Solutions. | Bombas x Cotopaxi Merino Wool Hiking Performance Quarter Sock - Surprise