5.11. Tactical Rush 12 Back Pack - 2.5 L hydration reservoir included Compatible with hydration systems up to 70 oz. 16 total compartments, pockets, and slots to stow and organize your gear Yoked shoulder strap system with adjustable sternum slider Roomy secondary compartment with gear organizer 2-liter hydration compatible pouch with left and right velcro closures (hydration reservoir included)