Responsible Collection: Recycled/Repurposed Upper Material: stretch polyester ripstop Waterproofing: GORE-TEX Insulation: PrimaLoft (COLD.RDY) Lining: textile The Adidas Terrex Free Hiker 2 C. Rdy Shoe is designed to keep us on the trails when cold weather strikes. Built with Cold. RDY PrimaLoft insulation, these boots trap heat to keep our feet warm when the temperature drops, while the GORE-TEX membrane keeps moisture from seeping through to our socks as we hike along wet, icy trails. The Primeknit uppers offer a snug, sock-like fit that protects us from the elements, and the protective top-cover ensures our feet are protected from the worst winter has to offer. A responsive BOOST midsole cushions every step, providing bouncy energy return on long hikes, and the the Continental rubber outsole keeps a solid grip on slippery terrain.