My Korona 8×20 camera is heavy but it is still possible to hand carry it by the leather handle for short walking distance. Carrying it bare will expose it to scratches and knocks as it is easy to bump this big camera into walls and such.
So I went to buy a $5 foam camping mat, some Velcro straps with tape and went off to work on a DIY protective case. As seen in the video, I have the map trimmed to the required size including the corners and then add in the Velcro straps at the places where the different ends meet. The Velcro straps came with tape where I simply taped it to the foam. It may not last so I have sew a few of them in place instead. The foam is not to the best material to sew but I will monitor and see how well they stand up to the frequent opening and closing.
While this is for a ULF camera, it can be easily modified for a smaller camera.