[Durable & Water-resistant Tactical Backpack]Tactical bag features ultra strong shell fabric and construction are made of nylon fabric for long-lasting performance. The shell is tough and water-resistant and stitched with reinforced nylon threads. [Expandable Tactical backpack size]21 "; x 15" x 9" WHEN FULLY EXTENDED; Capacity: 39~64 Liters.The collapsible and expandable design lets you adjust the pack’s size to fit your gear. [Military Backpack with Molle System]Molle backpack Put a 4”×4” patch panels at the front and back to stick your name patches and morale patches,Heavyweight MOLLE loops and webbing for attaching additional tactical pouches and gear for 3 day assault pack backpack combat molle backpack. [Multiple Compartments Heavy Duty Backpack]:Military backpack has 3 main multi-compartment and dual zippered closure pockets including interior zip pocket and mesh pocket for more storage options.The main area expands from 5" to 10" to fit more gear. Each compartment has mesh or zippered pockets to store gear.This heavy-duty backpack has a laptop compartment. [Backpack for Travel]Military backpack has hydration compatible that works great for a hydration bladder(hydration bladder is not included) as hydration backpack. It can be used as 3 day assault pack, gym backpack, bug out bag backpack, range bag, survival backpack, army backpack, molle backpack,men backpack, hunting backpack,outdoor camping backpack, travel backpack or day pack for daily Use.