Combining a patented posturetech 660 response spring system with a stunningly supportive layer of geltex the sealy pearl geltex posturepedic mattress provides an innovative sleeping surface the spring base of the mattress uses a zonal construction to help provide a more natural spinal alignment as well as to provide comfort and support across all areas of the mattress the geltex filling is the most advanced mattress technology around its open cell structure ensures breathability to keep you