This is the "NEW" Yoder Cougar boot with Yoder heavy chaps. Comfort zone on these boots are 20-80 degrees. They are light weight and waterproof. Very durable with comfortable sport insole, also have a self cleaning outsole.The Yoder heavyweight chap has a 400 denier waterproof inner layer and a 1000 denier outer layer. These chaps are very tough yet comfortable to walk in