The relyon pocket sensation mattress is a pocket spring mattress with1000 pocketed springs which shape to the body contours for perfect support it is a superflex foam roll up mattress providing a more efficient way for the product to be packaged and transported they are designed to expand once opened usually taking a maximum of 24 hours to reach ideal sleeping condition the relyon pocket sensation 1000 mattress is built to provide fabulous comfort thanks to a mix of pocket springs and superflex