Boasting a winning combination of Sealy's advanced PostureTech CS spring system and wool's remarkable natural properties, the Sealy Advantage Topaz Mattress ensures complete comfort throughout the night. While the spring system extends support across the entire width of the bed, eradicating dead spots, the wool fibre comfort layer offers excellent insulation while remaining wonderfully breathable. The mattress' Medium rating means it's a fantastic choice for mid-weight sleepers who want to balance support with a nicely cushioned feel. As well as the PostureTech CS spring system and the wool comfort layer, the Topaz also utilises EdgeGuard technology to reinforce the springs and extend their lifespan. This high-density foam strip is placed inside each of the springs, strengthening it and allowing it to offer greater support. Unbeatable comfort with the innovative PostureTech CS Spring System The Topaz design is centred on the incredible comfort of the innovative PostureTech CS spring sy