<strong>Capacity : 20 Liters / 1,203 Cu.In</strong>. <strong>Compartments : 2</strong>. <strong>Pockets : 4 Internal / 3 External</strong>. <strong>Complete with a 2.5 Liter hydration bladder</strong>. Main compartment w/ zippered mesh pocket & accessory pockets. Bottom compartment with mesh pocket. 2 side mesh pockets. Dual concealed hydration ports on shoulder straps. Five compression straps: 4 horizontal & 1 vertical. Dual bottom cinch straps to retain sleeping pad or jacket. Loop panels for ID�s & patches. Back panel hydration pocket. Padded back panel w/ ventilation. Adjustable padded shoulder straps