I have never heard of this. I certainly do not have one. There is a wind deflector built in that pops up when you use the mysky as a sunroof and slide it back but it stays down when you take the panel completely out.Couldn't find anything through search. The mysky is missing the wind deflector to put on when you take out the panels. Says in the manual there is a part and its in the storage bag as well saying to put it in. Last I heard about it was there was no answer.