Soft Protective Lens Wraps
I have been using wraps or bags that I get at the dollar stores. These are made of a softer canvas-like material, have a plastic zipper. I have one for each of my Canon 70-200 f4 and 15-85mm and they compliment nicely the lens case for my 400L lens.
Been using these for about two years.
These 'cases' are used in both my (non-photo) backpacks for travel etc, as well as in my LowePro bags.
I don't 'baby' my gear but I don't abuse it. These cases provide ample protection at modest cost and take up very little space. Plus they are quite inconspicuous out there in the real world!