The clear plastic is torn away from the zipper on one of the openings. It may have come that way or happened when placing over the frame. I patched it with duct tape, but no good. I’ll come up with a fix (it doesn’t bother me enough to return). On the bright side, the directions said two people would take 2 hours to assemble -it took me 20 minutes, but it may have taken longer if I was talking and drinking with another person ;)