I ordered this K&F Concept Camera Bag Camera Insert bag so that I can carry a small mirrorless or film-based SLR in my "ordinary" backpack.

I have more camera backpacks than you can shake a stick at, but they all have capacities far beyond what I need for a simple shoot when I'm riding my mountain bike. When I ride my bike, I prefer to wear a plain backpack that holds a jacket, some water, and maybe a snack or two. I hesitate to just dump any of my cameras into the backpack as there is very little padding and a tumble off my bike would likely damage my body and any camera that was in the backpack.

This bag insert fits easily into my backpack. It is large enough to hold my XPro1 or my AE-1 and one additional (small) lens. It is very well padded and seems to be very nicely constructed of decent material. If you are thinking about getting one of these for yourself, pay very close attention to the dimensions and compare them to your camera. This bag insert also has a nice carrying handle should you choose to just carry it. You can also add your own strap by attaching it to the built-in strap hooks.