Perfect mattress for people with back issues and sleep cycle issues – This is perfect! My sleep has improved a lot since i started using it. I have lower back issues and back pains has reduced thus lets me sleep without waking up in between hours. What’s more amazing about it is it maintained its shape. There is no dent or anything. I love that you can flip whichever side you want to sleep on, the cool gel or the semi firm side. Plus, the product was delivered right next to my doorstep just as instructed.