Anything that is built to last has good foundations, featuring our patented AlignSupport®, the Sealy Newton Posturepedic mattress has springs that have been cleverly developed to provide genuine, lasting support. AlignSupport™ is a two stage spring that starts by sensing your shape as you wriggle into your comfortable sleeping position. It then provides you with deep-down, consistent support that’s personal to you since it responds to your body. Also, the entire spring unit is twice tempered, which means it’s twice as strong and durable. So, you can rest easy knowing this mattress has got your back. Literally.