Sealy Burnham Extra Firm Mattress | PostureTech™ 2.0 | DualEdge™ | St James Bed Centre

Sealy Burnham Extra Firm Mattress – Engineered Support, Lasting Comfort

Every detail of this firm mattress has been thoughtfully designed, rigorously tested and expertly crafted to deliver long-lasting performance for every type of sleeper.

PostureTech™ 2.0 – Smart Spring Support
At its core is PostureTech™ 2.0, Sealy’s new smart spring technology. This is no ordinary spring. The unique geometry responds to your individual body shape to provide deep-down support. Delivering consistent support right across the sleep surface, it distributes weight evenly and helps maintain a natural shape and healthy posture. Using a higher gauge wire for greater stability and performance resilience, it’s twice tempered and rigorously tested by Sealy Scientists to make lumpy, uneven mattresses a thing of the past.

PostureTech™ 2.0 support is combined with 1200 micro pockets and Microcell™ & OptiForm™ to conform and cushion, creating a firm comfort feel.

DualEdge™ – Maximise Your Sleep Surface
DualEdge™ pushes the boundaries to maximise the sleeping area of your bed. This unique innovation supports the spring system, reinforcing both the sides and edges of the mattress, stabilising every inch and extending the usable sleep surface. Whether you prefer sleeping right to the edge or need somewhere to sit while putting on your socks, DualEdge™ makes the most of your mattress.

Intelligent Comfort Architecture
Enhancing the support system is a premium layer of comfort technology designed to work in harmony:

• 1000 Micro Pockets: Individually contour to your shape for enhanced comfort and tailored support
• MicroCell™ Foam: Durable and resilient with an open-cell structure that enhances breathability while delivering a soft, sumptuous feel
• OptiForm™ Firm Foam x2: Double layer gently cushions and adapts to your body for balanced support without compromising resilience
• Airstream Fibre: Promotes airflow through the mattress for a fresher sleep environment
• Eternity™ Fibre: Adds lasting comfort and helps the mattress retain its feel over time
• Bio Based ProShield®: Protective layer using bio-based materials for added peace of mind

Sustainably Designed
From TCPP-free foams to a construction that reduces adhesives and improves recyclability, every layer has been thoughtfully considered — delivering sustainable progress without compromising comfort or durability. It’s exactly what you’d expect from the world’s No.1 sleep brand.

Full Specification

• Firmness: Extra Firm
• Support Core: PostureTech 2.0™ Smart Spring System
• Edge Support: Dual Edge™ Technology
• Comfort Layers: 1000 Micro Pockets, MicroCell™ Foam, OptiForm™ Firm Foam x2, Airstream Fibre, Eternity™ Fibre, Bio Based ProShield®

St James Bed Centre Service

• Free Local Delivery to Swaffham, Fakenham, Hunstanton, Sutton Bridge, Downham Market
• Free Old Bed Disposal when we deliver your new Sealy
• Try Before You Buy: Visit our showroom to test the Burnham in person
• Sleep Experts: Independent bed specialists with honest advice