Sealy Sleep Select Firm Super King Mattress
Pay securely with
♻️ Old bed or mattress collection available from £24.95 – add it at checkout. Find out more
Honest, firm support.
Double OptiForm Firm foam under a tight top over PostureTech 2.0. A straightforward, supportive firm mattress at a great price.
Size: Super King (180cm x 200cm)
Firmness: Firm, 8/10
Best for: Back and front sleepers who want firm support with a touch of give.
Why it's good for your back
- Classic firm feel. A tight top keeps you close to the support system for a firm, steady surface.
- Posture-friendly support. PostureTech 2.0 distributes weight evenly to support a natural spinal shape.
- Strong edges. EdgeGuard extends the sleep surface and keeps the sides firm.
- Sealy quality, sensible price. The same PostureTech 2.0 coil as the Luxe models.

PostureTech® 2.0: deep-down support that springs back
A higher-gauge wire and re-engineered head design give a steadier, more stable base. The coil's unique geometry responds to your shape and spreads your weight evenly, so hips and shoulders are supported rather than left to sink. Twice tempered and tested by Sealy scientists.

What's inside, layer by layer
- Bio-based ProShield®: Endorsed by Allergy UK. A VOC-free treatment that keeps allergens at bay for a cleaner, fresher sleep.
- Airstream Fibre: Nestled in the quilt for soft, lasting comfort, replacing the need for an extra foam layer.
- EternityFibre: Works to reduce settlement, so the surface keeps looking and feeling its best.
- Double OptiForm™ Firm foam: Two firm comfort layers for a supportive, confident feel.
- PostureTech® 2.0 coil: Sealy's new spring: higher-gauge wire, re-engineered head, twice tempered. Unique geometry distributes weight evenly to support a natural, healthy posture.
- EdgeGuard™: A single edge-support system surrounding the springs for stability, durability and a wider sleep surface.
EdgeGuard™
A single edge-support system surrounding the springs for stability, durability and a wider sleep surface.
Specification
- Construction: Tight Top
- Spring: PostureTech® 2.0
- Edge: EdgeGuard™
- Depth: 25 cm (approx.)
- Fabric: bio-based ProShield®, endorsed by Allergy UK
- Mattress only
Sealy Sleep Select mattresses are not medical devices and are not intended to diagnose, treat or cure any condition. Comfort and firmness preferences are personal. If you have a back condition, please take advice from your GP or a physiotherapist.
Specifications
| Width | 180 cm |
|---|---|
| Length | 200 cm |
| Depth | 25 cm |
- Super King Mattress. (180cm x 200cm)
- Firm feel, firmness 8/10
- PostureTech® 2.0 spring system
- EdgeGuard™ edge support
- Tight Top construction
- Double OptiForm™ Firm foam
- Bio-based ProShield®, endorsed by Allergy UK
- 25cm deep
