On the plus side the mitgeliferte shell made of soft plastic (PE presumably?), Which is enough to step-protected around the filter in your pocket, but soft enough not to splinter when it was time pinched somewhere.
Negative is only that one has no idea who the manufacturer is, and thus at the next filter back verbanque game arrives to find out what you can buy. A bit more openness by the importer would have an advantage here.
