One with a fabric rear section (can't call it a window, I guess) would be simple to do. If you are interested in one, please PM me and we'll sort it out. Vinyl is more expensive than nylon, and harder to get, so opaque rear section is fine with me.Very nice, impressed! Are you planning on any versions with a fabric zippered rear window rather than plastic? Figure the plastic will wear quick, especially in the cold and fabric would keep eyes off. I'm running a review camera and no mirror so don't need the visibility.