It doesn't get much warmer and/or dryer, the A.T.A.C. 2.0 8" Insulated boot features SlipStream waterproof/breathable/BBP resistant membrane plus 400 grams of insulation. It's lighter and more comfortable, yet maintains its reputation for toughness and durability. Full-length dual durometer Ortholite footbed work to keep your feet dry and comfortable all day, every day. The Achilles heel flex zone, gives a critical part of your foot more range of motion without compromising support. The full-grain leather toe and 840D nylon upper provide the kind of rugged durability you need; while the knife pocket keeps an important ally within reach.