I haven't found an earlier topic about it... So I've got a protection case from ebay (stock image):
It feels soft on touch and fits m+m precisely. It's not too thick so it probably won't protect the device if one drops it on the floor, but it seems a useful addition for everyday use to ensure m+m won't get scratched or anything.
There are two large pockets inside usable for documents, credit cards and similar; and one small pocket about the size of an SD card.

It feels soft on touch and fits m+m precisely. It's not too thick so it probably won't protect the device if one drops it on the floor, but it seems a useful addition for everyday use to ensure m+m won't get scratched or anything.
There are two large pockets inside usable for documents, credit cards and similar; and one small pocket about the size of an SD card.