The Pronghorn is made of durable, waterproof upper. It features an abrasion resistant toe and heel cap, rugged hardware for a secure fit and long lasting performance, 100% waterproof and breathable GORE-TEX lining, cushioning three density open cell polyurethane OrthoLite footbed, the lightweight and stable performance of Danner's TERRA FORCE platform and the Danner Pronghorn outsole for solid traction over rugged terrain. Also featuring 800G Thinsulate Ultra Insulation.