Supposed to cover "all sharp objects" with padding before putting the cover on. Says so right in the instructions...
My first ADCO cover lasted 11 years before I finally replaced it because it was growing moss on the top and one of the zippers would not zip anymore.
Replaced with another ADCO and it's on it's second year now and no issues what so ever.
I have to park my trailer under trees all winter, so without the cover, my trailer would have been ruined a long time ago...
I think covers are great for some and not so great for others...
Here is my first cover when it was probably 8 years old or so... The choice is obvious for me..
Mitch