Our iDealist collection with Pocket Springs provides superior support for the individual. This mattress is made of individually encased springs, which reduces motion transfer while relieving joint pressures at the same time. Furthermore, a wide foam encasement provides strong edge support for added quality and comfort complimented by Gel Infused Lumbar Support. The Extra Firm gives initial plushness quickly followed by the firm support you desire. Our core is just the right firmness balance to ensure you don’t sink into the mattress or feel like you are sleeping on a board.