Tactical Assault Sling Pack Military Molle Hydration Backpack Hunting Range Shoulder Sling Bug Out Bag Backpack Daypack MATERIAL: Constructed by 900D nylon material, and internal surface are made of waterproof material, wearable and durable. CAPACITY: This tactical assault sling pack can accommodate about 35L. Size approx.:9.8 x 15.0 x 6.3 inch (W*H*D) it's not a big pack which is suitable as a 3-day bug out bag. With a zippered hydration rear pocket works great for a 2.5L hydration bladder ( bladder is not included), this military pack can also be used as a hydration backpack or portable cooler for outdoor, hunting, fishing, camping, hiking, ect. Molle Straps, D rings, attachment points: allows excellent attachment of pouches, accessories, caribiners, etc... when needed. Adjustable Y-shaped buckled front strap and compression straps keep your gear secure and stabilize the load for easy carrying. With a wide padded adjustable shoulder strap, mesh padded back, and top handle are provided to help comfortably carry extra heavy loads, and the waist straps to help reduce the sway of the bag while moving.