https://classicaccessories.com/rv?cat=112
Have the poly pro.
Plus its very light weight, breathes well and it hasnt ripped in 4 years. I can install and take off by myself fits in small bag.
No damage to the rv body.
Down side
With snow piling up on top the cover rubs on the edge of the roof. This is in the area of the a/c unit on sides of roof where it meets the side wall.. The weight from the snow will pull the cover tight. Normally w/o snow its just an air gap.
This year because of that I did not cover my unit. Now if I had the more time I would of covered it.
Plan on running eternabond tape in area of the rub, maybe next year.