The mattress only rose to 9” and has very little side support. Without a mattress protector and fitted sheet, I would say it is a plush-medium. However, once you put on the cover  sheet, it feels way too firm. I suppose it makes sense, since the sheets affect the give of the memory foam, but I find it strange that this hasn’t happened to any of my other memory foam mattresses. For the time being, I have removed the fitted cover  sheets and draped a king flat sheet over the mattress so that it feels more plush. Besides these drawbacks, the mattress is very high quality  feels like you’re sleeping on a cloud!