Join the Rugged Nation! This is an expandable, tactical camping and hiking backpack. It is constructed from high quality water resistant 600 Denier polyester material with heavy oversized zippers and tabs. The main compartment is expandable and MOLLE compatible which allows customizing the pack for all your hiking and backpacking needs. The main compartment expands an additional 5 inches, from 39 liters (2380 cu in) to 64 liters (3905 cu in). The rear compartment has a hydration port and can carry a 3 liter hydration bladder (bladder not included). Two additional front compartments with several organizers allow for tons of storage options. The side parachute buckles allow for tightening to provide a compact and easy to transport pack. There is a removable waist belt, carabiner, water bottle mesh, two electronics pockets (on the shoulder straps) and a daisy chain on the front to hold additional gear. This backpack is suitable for all your backpacking, hiking, camping, climbing, fishing, traveling, and all other outdoor activities. No matter what you're doing it ensures you will be prepared for your next adventure!