This is one of the better toppers Ive used so far. Ive laid on mostly Serta. The standard memory foam, the half cooling gel memory foam, and the all cooling gel toppers. This Bamboo from Lucid has cooling holes cut throughout which allow for, what I feel, air to circulate better. Im a hot natured guy and sweat while sleeping on the other toppers. I have been much cooler while sleeping on this. I recommend the 3 or 2 inch thick toppers. The 4 inch was too much. I sank into it so far that I would wake up every time my body needed to roll over. I would have to pick myself up out of a hole to roll over. Not good sleep at all. The 3 inch seems to be the best for me. Also, the instructions say, after opening the topper, let the foam expand for 48 hours. Mine needed every bit of that time to fluff up after opening the vaccum seal. After it was initially set, it had no problem resetting within minutes after getting up.