Bedroom by Sealy

Sealy is the largest mattress maker in the world by volume, with British operations running out of Cumbria since the 1960s. The American parent company invented the Posturepedic range in 1950 with a panel of orthopaedic surgeons, and the back-support story is still the brand's anchor today.

The UK range covers three connected lines. Posturepedic is the flagship: pocket-sprung mattresses engineered for back support, with reinforced lumbar zones and slightly firmer feel that suit back sleepers and heavier bodies. The Ortho Plus and Ortho Posture ranges step the spec down a tier and the price down with it (around £400 to £900 for a king-size). The Activsleep range and the Hybrid lines bring memory foam and cooling layers into the mix for warmer sleepers.

Where Sealy sits in the market is straightforward: they're the brand to consider when back support is a real factor and the budget runs to £600 to £1,500 for a quality king-size mattress. Less heritage-marketed than Hypnos, more spec-driven than Silentnight, with a long-term build that holds up.

We list 990+ Sealy products across Mattress Next Day, Mattress Online, Mattress Man and a long tail of other UK retailers. Filter the grid above by size or price to narrow things down. Prices update daily.