Large pack dockable (probably doesn't make sense on Umlindi but could be a great choice for the bigger packs)
Top loading main compartment
Oversized slanted wand pockets will each hold a 2 liter water bladder without intruding significantly into interior space
9" zippered suspension side pocket fit every 13.3" and smaller display laptop we tried, some of the 13.5" display laptops, and even one of the 14" display laptops. Or one of the pocket framesheets. Or the water bladder folks ask about.