The Sealy Reflections Newport is a plush top latex/pu foam mattress. It is 10.5" high, has a 8.4" latex core which leaves 2.1" of assorted soft pu foam on top to give it that plush, or as one forum member describes it, "poofy" feel. I'm guessing that the latex core consists of a top layer of 0.9" ILD 19 Talalay process latex and the remaining 7.5" is ILD 34 Dunlop process latex or a combination of layers of high ILD Dunlop latex. I would not be that concerned about the quality of the Dunlop latex since it is probably manufactured by Sealy owned Sapsa, who manufactures very high quality Dunlop latex.
When we first tried this mattress out I found the top to be a tad soft but still supportive. My wife, who recently has had a total hip replacement, loved it. Our old mattress was a 15 year old cushion top firm Serta Perfect Sleeper. The Serta was still in good shape, no sagging, but too firm for my wife after her hip surgery. After 3 months my wife loves the way the mattress conforms to her hip and she has had no aches or back pain. We are both side sleepers. I though am still experiencing some morning back pain which dissipates shortly after I'm up. If you read through the forum you will find others that have had back pain when going from a firm inner spring mattres to a latex mattress. Hopefully my back will adjust because our comfort guarantee ran out and my wife did NOT want to trade it in. Except for occasional muscle back spasms, I think my back is in fairly good shape.
My wife gives this mattress an excellent rating but for now, until my back adjusts, am giving it a good rating. For those with arthritis, fibromyalgia, fibromyositis, hip or knee replacements this is an excellent mattress. It conforms to your body. For those with serious back problems like disc disorders, I would look for a firmer inner spring mattress.