It is called a pillow-top mattress or pillow mattress, which is a relatively high-end mattress. On the top of the mattress is sewn a layer of soft cushion, which can also be called a buffer layer. Due to this relatively comfortable and soft cushion layer, the comfort of the sleeper is greatly increased. And because this cushion layer is separated from the mattress, it looks tall and thick like a pillow, so it is also called a pillow mattress.
