Large Capacity: COSCOOA military tactical backpack size: approx. 11.8 x 19.6 x 11.8" (W x H x D), capacity: 50L. With large capacity, you can carry all tactical gear to be used as a 3-day backpack Assault backpack, bug out backpack, emergency backpack, combat backpack, camping backpack, tactical EDC outdoor backpack, hunting backpack, travel backpack, survival backpack or trekking backpack and so on. DURABLE WATERPROOF FABRIC AND MOLLE SYSTEM: COSCOOA tactical military backpack is made of durable and water-resistant 800x800 density Oxford fabric and nylon water-resistant materials. It is more durable and scratch-resistant than traditional hiking backpacks, with high-quality buckles and zippers, tearable and durable. Practical Multifunctional Backpack: This tactical assault backpack has 2 main compartments, 2 small compartments in the front and 1 large compartment in the back. The large main compartment features a 17 inch laptop sleeve, 2 mesh pockets, and can be fully opened to the bottom like a suitcase, perfect for carrying clothes, shoes, foldable tent, umbrella, 2-3 days water bottles and so on. Comfortable Ergonomic Design: The COSCOOA backpack features adjustable and breathable mesh shoulder straps with ample sponge padding to relieve your shoulders. Widened and thickened S shoulder straps and high-elastic breathable back support for the best ventilation and relief. There are also hip belts to fix the backpack more stably. Army MOLLE System: The front and both sides are equipped with MOLLE system, Molle webbing for attaching extra tactical pouches or gear as a 3-day assault backpack combat molle backpack. The D-shaped loop on the shoulder strap can be used to hang keys, cups, etc.The Y-strap and buckle on the front are great for rolling up a sweatshirt or light jacket. And the straps at the bottom can be used to hold a tent or sleeping pad.