I have a sleep number bed and even though you can adjust the firmness I couldn’t get comfortable, so I purchased this mattress pad and it was perfect making my mattress more comfortable, it gave me support without being too soft . Easy feeling on older achy bones !! It was a very good purchase so I bought a second one for my husbands side of the bed.. We are both sleeping better ! The price was right and super fast secure shipping ! Thanks Wayfair !!