The foam mattress topper arrived 8 days ago. After 6 days I was ready to just return it because it was still completely out of shape, with ugly folds that made it look like it had been packed tightly for 2 years and keeping the room uncomfortably hot did not help much., Not only that it stayed out of shape, none of the corners are square. It was sold as a "short queen" size.....I wonder if you sell mattresses that size - I've never seen them!
Today the deep creases finally showed improvement and I have decided to use the topper to make some window seat cushions (can cut around the bad sections) Still a lot of extra cutting to get straight 90 degree corners.
I will not return the topper, but will be very hesitant to order another one online.  I don't like to give a bad rating, but I want you to be aware of the problem.