I received this item a couple of weeks ago.  It did not have straps for the bottom as it said.  The help desk was very nice, declared that one defective without the straps, and sent me a second one.  Guess what.  That doesn't have straps either.  Although the outward facing label on the package says clearly that their are straps in the package, neither installation guide for these covers mentions straps and there is no slot for straps on the bottom elastic strip.  No need to send another.  This simply isn't as advertised.  The problem may be with the supplier.  Wayfair tried to help on the first one, but not asking them to send a third.  I could use some third party straps IF I can find them.  Don't buy this if you don't want to be disappointed.