55 liter top load main compartment with gusseted drawstring closure and adjustable top lid * Internal hydration reservoir sleeve and dual exit ports for tube (reservoir not included) * Front load sleeping bag compartment with divider * S-Shaped ERGO-FIT shoulder strap harness with load lifters to fit trimmer torso * 29.5x14x8.25inches (74.9x35.6x21cm) 55 liters 3356 cubic inches