The Titan 55 internal frame backpack has the load-carrying versatility you need without sacrificing fit adjustment or features.  Here is the long list of features and you can see other info by clicking on the pictures and blowing them up! 

• 55-liter, top-load main compartment with gusseted drawstring closure and adjustable top lid.

• Front-load sleeping bag compartment with divider.

• S-shaped ERGO-FIT shoulder strap harness with load-lifters.

• High-density foam padded back panel, with large AIRFLOW™ channels.

• Hinged front pocket, with mesh side gussets.

• Padded grab handles.

• Internal hydration reservoir sleeve and dual exit ports for tube (reservoir not included).

• Removable media pocket.

• Adjustable side and bottom compression straps.

• Soft lashing hardware.

• Dual mesh pockets hold water bottles.

• Convenient zippered pockets.

• Tuck-away rain cover.

• Weight: 4.05 lbs

Body Dimensions: 30.5" x 14.0" x 8.25"