Featuring lightweight Cordura construction, these boots offer 800-gram Thinsulate Ultra insulation. A GORE-TEX bootie delivers durably waterproof, windproof, and breathable comfort and protection in the field. Oil and slip-resistant Shadow Trek outsoles are made of nonmarking carbon rubber that flexes with each step to dampen sound. Welded TPU midsole supports your feet. Thermoplastic urethane TPU toe and heel cap protect your feet. Metatomical polypropylene footbeds are excellent shock absorbers and retain the memory of your feet for added comfort. Assembled in the USA.