At 10.4 lbs. and 5278 cubic inches, the TD-UD529 leaves almost 40 lbs. of packing space for every trip. This bag contains multiple separaters and zippered pockets, one of which is waterproof,  for organized packing.  With its handle system and wheels mounted on the exterior of the bag the packing surface is flat and capacity maximized. There is also a small exterior zippered pocket on the TD-UD529 positioned in between the posts of the handle designed specifically to hold a map or umbrella.