The Sealy Posturepedic Pebblebrook Medium mattress offers pressure-relieving comfort and targeted support to help maintain natural body alignment and reduce nagging Bed Aches night after night. The orthopedic-inspired Posturepedic Pro Support System features exclusive PrecisionFit Coils enhanced by MaxSupport Technology for all-over support. And the DuraFlex Coil Edge provides a reinforced solid surface that's built to last.