Queen 3" memory foam hybrid topper has 2-layers:
Memory Foam on top of a perforated polyurethane foam base, for cooling giving the soft comfortable benefit of both.
Non-smoking home, no odors, medium firmness density.
It also comes with a removable polyester cover, which protects the topper and is typically sold separately. It has a zipper which makes it very easy to remove for hand washing.
This is a medium-premium quality topper! Not a low-end one.
It was purchased and used about 4 months. But then we bought a new mattress and didn't need it. It has been properly stored in closet for 2-3 years. So it is still excellent to like new condition.