The Eberlestock Mainframe II maximizes your field efficiency with a modular platform designed to handle the most demanding tactical and backcountry loads. This pack system utilizes an aluminum shelf frame to provide a rock-solid foundation for everything from specialized electronics to heavy recovery gear. The new suspension system features robust air-mesh padding and elevated load lifters to regulate body temperature and maintain a natural posture under weight. With its auto-locking compression buckles and extensive MOLLE real estate, you can quickly configure your loadout for a day trip or an extended expedition. The Mainframe II is more than a pack; it is a legendary durability upgrade for your entire gear collection. Aluminum 90-degree shelf frame supports immense weight.