As I have experienced with K&F Concept carriers up to now, the materials are top grade throughout. This particular model has more padding within the panels. In addition the exterior back (what people behind you see) is the semi-rigid 'hard shell' mentioned in product descriptions. It has a formed flat sided bulge coming to a peak. I imagine there is a thin sheet of formed plastic within that panel.

The bag comes with a light grey rain cover with elastic hem running around the complete edge. The shoulder straps are thickly padded and super comfortable. On both exterior narrow sides there is a pocket that has a gusset to expand if needed. Otherwise an elasticized strap keeps it laying flat against the backpack. On one side there is an additional nylon webbing strap so I took this to be where you could carry a compact tripod. The new ultra light tripods should be fine with that. I tried it with an old school all metal tripod and the legs were just too bulky to get all 3 of them in the pocket. The nylon webbing strap doesn't have a buckle that separates so I couldn't get that strap an inch higher where it would be able to stop the tripod slipping up, out of the bottom pocket. Again that's with my old tripod that might be called mid size.

The main compartment would be large enough for the three main bits of gear that I now take everywhere: Mirrorless camera in a cage with the factory 28-70mm lens, a 70-300 telephoto, and a typical speedlite. My let down was that I can't see a way to secure the camera at the bottom and then use the supplied hook and loop panels to create shelves for anything else. The panels are a few inches short of what could possibly build up the sectioning I envision. The only access to the compartment is the full sized back panel with its wrap around zipper. There are no trick side hatches for quick access to a single item.

For someone that can picture their gear being tucked away in the space this offers, the bag won't let you down in terms of protection, materials, and comfort.