Review has been edited to add Wayfair customer service is absolutely incredible and they have quickly processed my request to return and refunded. I’ll always give extra stars for wayfair, they can’t always control how a product works out but there customer service can’t be beat! 
With that said....
Absolutely the worst memory foam topper I’ve ever used. Do yourself a favor and save your money, WAY too soft, no form whatsoever sinks in way to much not like real memory foam where it slowly comes up to regain shaped this is just a 4in foam pad, we’ve attempted to sleep on it for 3 nights waking frequently In pain! 
We had a nice mattress to begin with I just wanted to add memory foam pad this is definitely   not that!