We bought a king bed from an estate sale and wanted to make this bed very comfy because after 9 years in our queen bed that was supposed to be comfy is no longer helping my husband sleep well at night, his back hurts alot and so we decided to purchase a gel memory foam and fiber mattress topper for our KING bed to give it a try. We slept in it last night and it was AMAZING!!! Hubby woke up this morning and said I LOVE this, and that his back doenst hurt and he slept so well!! A plus side, Ive always wanted my bed to be "bigger" and this topper has made my bed "bigger" and "higher just how I wanted. You will sleep soo well on this! If your back hurts, this is perfect! If you buy this and arent happy with it, then I dont understand you! I'll gladly take another one! haha ;) I would buy this again for my old queen bed in the guest room!