This 75L backpacking backpack is made of 600D polyester with Ykk zippers, includes a rain cover. It features a hydration compartment that can fit a 3-liter bladder, the tube feeding through the top side of the bag near the grab handle. This tactical-style backpack has Molle webbing, so you can hang tools, trekking poles, tents, sleeping bags and other outdoor gear using the molle system, you can also attach items using the side straps and side pockets. It has two quick-access side pockets sized to hold water bottles or camping and survival gear, plus a large front zippered opening that lets you quickly access the main compartment, which can open to accommodate a 15.6-inch laptop. Equipped with chest straps to help distribute weight, this versatile pack works as a 3-day assault pack, bug out bag, survival backpack, trekking backpack or daypack, is suitable for hiking, hunting, trekking, camping, climbing and travel. Available colors: Black, Khaki, Ranger Green