Please read the whole review...........The Panda Topper turned my superb mattress into an exceptional mattress. I invested in John Ryan Naturals mattress which is an amazing mattress in it’s own right. I wanted to protect my investment as recommended by John Ryan. I searched high and low for a topper that was worthy of topping my new mattress. For the first two weeks I was comfortable on the Panda topper but it was not exceptional and my chronic backache remained .....HOWEVER......... as time has gone on the topper has created the most amazing sleep experience ever. Incredibly, I can now get out of bed without long-standing chronic backache, having had the most amazing sleep of my life. I will never sleep on anything else. I cannot wait to get to bed now, knowing that such comfort awaits! Everything about my experience with this purchase has been 100% and I can not recommend it highly enough. Very grateful for the trial period as it demonstrated to me how your body needs to adjust to a new mattress/topper.