Pack loads of gear and then access it without unloading the entire pack. The ALPS Mountaineering Caldera 75 has a large front-access zipper that sits behind the front wing lashing system.
Features
Generous front access to main compartment and full-access lower compartment with #10 zipper; internal horizontal divider separates the two
Extendable, removable lid top converts to a fanny pack
Side pockets offer room for trekking poles and water bottles
Tekking pole loops
Hydration pocket and ports on both sides of pack (reservoir not included)
Lightweight 200-denier double ripstop nylon construction