Highly organized and well built. Delightful to carry. Great exterior and interior materials. The 18L is quite compact.
Rugged builds with lots of organization and access. Organization inserts available. Lots of capacity. Multiple sizes.
Another one of my personal favs. A little bigger (though they have a small size as well).
Burly and tactical in design. Solid external access. Customizable segmentation of main compartment with padded hook and loop shelves and side access. 16" laptop fits tightly in protective compartment.