Very Firm Blue Foam Mattress UK

Ultimate Support with High‑Density Orthopaedic Foam

Solid Comfort for Back Support and Restful Sleep

The Rock Very Firm Blue Foam Mattress by Sleep Heaven is engineered to provide exceptional orthopaedic support with a high‑density foam core that responds to your body's contours. Its very firm construction helps promote proper spinal alignment and minimise aches and pains throughout the night, making it ideal for sleepers who prefer minimal give and maximum reinforcement. 

Designed with a deep 25 cm profile and wrapped in a luxury 4‑way knitted stretch fabric, this full‑foam mattress offers reliable edge‑to‑edge support without springs and a sophisticated look that enhances any bedroom. The turnable design encourages regular rotation to help maintain performance and longevity. 

Finished with flag‑stitched handles for easy handling and brand‑new materials that conform to British Fire Safety Regulations (BS 7177:2008), this UK mattress balances durability with comfort. Whether you're furnishing a main bedroom or guest room, the Rock mattress provides practical, long‑lasting support for a restful night's sleep. 

Transform your bedroom into a haven of relaxation with this stylish and supportive orthopaedic mattress.

Mattress thickness 25cm.
Firmness Rating: Very Firm
The fabric's colour may vary over time, but the material's quality may not remain the same.
All our Products are Brand New and Conform to British Fire Regulations- BS 7177: 2008

Overall dimensions:​

Small Single: 2ft 6” x 6ft 3” / 75cm x 190cm
Single: 3ft x 6ft 3” /90cm x 190cm
Small Double: 4ft x 6ft 3” / 120cm x 190cm
Standard Double: 4ft 6”x 6ft 3” / 135cm x 190cmKing Size: 5ft x 6ft 6”/ 150cm x 200cm
King Size: 5ft x 6ft 6”/ 150cm x 200cm
Super King: 6ft x 6ft 6" /180cm x 200cm

It is also available as a 20cm thick mattress.

Please view other Mattresses from Sleep Heaven.

Please view our Mattress Range.

Frequently Asked Questions

What makes the Rock Blue Foam mattress very firm?

This mattress features a high‑density foam core that delivers very firm support, helping promote spinal alignment and reduce aches and pains for sleepers who favour firmer surfaces.

Is this mattress suitable for back support?

Yes — the very firm orthopaedic foam core is designed to support proper posture and help relieve tension in the back and shoulders. 

Does the mattress require turning?

Yes — this mattress is double‑sided and turnable. Rotating and flipping it regularly (using the built‑in handles) helps distribute wear evenly and extend the mattress's lifespan.

What cover does it use?

It features a luxury 4‑way knitted stretch fabric cover that enhances breathability and adds a comfortable finish. 

Is the mattress compliant with UK safety standards?

Yes — all Bedz4u mattresses, including this model, comply with British Fire Safety Regulations (BS 7177:2008). 

What sizes are available?

The Rock Very Firm Blue Foam Mattress is available in standard UK sizes from Small Single up to Super King.