Head for the High Alpine. To create a lightweight, nimble USA-made hiking boot that can stand up to extreme conditions, Danner collaborated with America's oldest search and rescue organization based in Hood River County, Ore. The Crag Rat Evo has a GORE-TEX liner for waterproof protection, and the engineered synthetic leather and textile upper features highly breathable and abrasion-resistant Perspair side panels. An insulated Aerogel toe cap and crampon-compatible TPU heel clip keep you moving in very low temperatures.