Compact Tactical 3-Day Backpack Waterproof 600D Oxford Material, Molle Webbing, Heavy Duty Zippers, Adjustable Load Straps to keep Contents Tight and Secure Top Carry Handle, Bladder Compartment with Drink Tube Strap Guides, D-Rings Adjustable Waist and Chest Straps, Adjustable and Detachable Padded Shoulder Straps with Snap Buckle Relases 4 Compartments, Main Compartment measures 17"H X 8"W X 2"D, Second Compartment 14"H X 6"W X 1"D 3rd Compartment (front bottom) 8"H X 6"W X 1"D, 4th Compartment (front top) 3"H X 6"W X 2"D, Main Compartment Wire Pass Through,