Constructed of heavy duty rugged material. 1 Mammoth zippered main compartment with 3 internal cinch straps to secure items. The large main compartment is equipped with 2 large mesh pockets to carry and organize gear and accessories. 1 Large pocket in the main compartment, ideal for a hydration bladder or to hold a laptop, notebook and tablet. Fitted storm flap and internal draw cord closure fabric extension for added protection. 2 large side zippered hydration compatible pockets with service ports and loop web strips. Fully padded back panel and lumbar support for comfort and protection. Features fully padded removable kidney belt and shoulder straps. Ladder torso adjustable shoulder strap system allows the pack to be adjusted to the users height. Internal support system. Top and side carry handles for easy carry. ID window on front of the pack. Loop patch on front flap closure to attach patches. All zippers are heavy duty with pull tabs. The bag is equipped with MOLLE attachment points throughout the entire bag. The MOLLE attachment points allows one to attach their modular compatible pouches and gear to the pack. Includes 4 external cinch straps to tighten the pack. External gear straps, ideal to hold a sleeping pad or sleeping bag. Quick release buckle system to ensure easy and fast access to gear. Dimensions: 25.5" x 15" x 10.5". Army green advanced modular compatible mountaineering travel backpack.