The materials are robust and you feel the quality as soon as you touch them. I managed to fit huge Tamrons 15-30 and 70-200 G2 and Sigma 150-600, and in the main compartment there was room for the Nikkor 85. The top part seems perfect for the Nikon Z6ii with 24-70 f4. There is still room for some filters in the side compartments and the top compartment seems to have a little more space. The zippers go very smoothly and the rain cover is a nice extra. What really surprised me was that when I fully loaded the bag and tried to put it on, the top right buckle opened and the bag fell down (and tore a hole in the sternum strap)! This was a great stress test to check the durability of the frame (no lens broke!), but the buckle thing still makes me uncomfortable. I have no idea why the buckle button releases the lock. The way I put on the bag is honestly not strange or unusual. Actually, it got unlocked a few more times, but I was ready: I turned the bag on while sitting on the couch, so the bag just dropped onto a soft surface. As I continued to test the fully loaded bag, the buckle seemed to stay in place. Jumping, walking, walking quickly, suddenly pulling the handle - in all situations it remained locked. My best guess is the loading weight. Although I haven't found any information on the maximum carrying capacity, I suspect that the equipment is simply too heavy (8.5 kg to be precise), which is a shame because all the lenses packed are necessary for my photography trips. In any case, the tripod is transported in a separate bag. I just hope the umbrella and/or water bottle still fits.