How come my AirPod Max’s don’t have the hole in the ear cover to remove the ear piece from the head band

I got my AirPod max’s from a friend for cheap and I verified them that are real on the apple website and some video but the only problem I’m having is my friends saying I sound like I’m underwater when I’m on ft and I notice the AirPod max’s don’t have the whole to remove the ear pieces from the head band like other peoples do. HELP!!! Please