SLEEP INNOVATIONS - SLEEP INNOVATIONS COOLING FOUR INCH DUAL LAYER TOPPER. WOW! Let me start out by saying this Dual Topper Set is so Soft and Cushiony! It is definitely at least Four Inches in Height if not higher. It might take overnight to fully expand (you can still sleep on it while it is expanding) but it does reach the advertised Four Inches. You start out with the Foam Layer and top that with the most luxurious padded Mattress Pad Topper I have ever seen. The Mattress Pad Topper I believe has the Cooling Technology. The Mattress Pad Topper is made from High Quality Fabrics and is removable for cleaning. I feel like I am on Top Of The World with this Set on My Bed! It is very comfortable and I feel like I sink into it but yet it is still very supportive. If you are in the market for a new Mattress Topper I highly recommend this Set! You will sleep like a baby!