It only contains the part that does not overlap with our thin filament. So the H zone is the region of the sarcomere that only contains the thick filament. Note that it does not include the entirety of the thick filament. Let's move on to our eyeband. The eyeband is this entire region that stretches not over a single sarcomere, but over two sarcommirs that are found adjacent to one another. So just like the h zone contains only thick filament, the iband only contains our thin filament.