The boot worn by the world's leading public safety personnel in a 6 height with side zip, the 5.11 A.T.A.C. 2.0. It's lighter and more comfortable, yet maintains its reputation for toughness and durability. A new air flow tongue and full-length dual durometer Ortholite footbed work to keep your feet cool, dry and comfortable all day, every day. Another new feature, the Achilles heel flex zone, gives a critical part of your foot more range of motion without compromising support. The full-grain leather toe, 840D nylon upper and Shock Mitigation System provide the kind of rugged protection you need.