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Sleep King Memory Foam Mattress

£ 249.99

Our best selling king memory foam mattress, offering great value for money while providing ultimate comfort.

Featuring our luxury 50kg/m3 memory foam and our 36kg/m3 high density support layer CNC cut with our unique tear airflow system to ensure that you get a brilliant night’s sleep without overheating. The combination of temperature sensitive memory foam and a high density support layer means our  mattresses closely conform to your unique shape and helps cradle your body and avoid unnecessary pressure on your body and muscles. Resulting in a deeper more restful sleep.

Unlike a coil spring mattress, there are no pressure points in places like your shoulders, hips, and knees. Your back is better supported because the mattress conforms to your back and helps it hold its natural shape.

Overall Firmness – Medium / Firm

Mattress Size: King
Dimensions: 5ft x 6ft 6″ (150cm x 200cm)
Total Depth: 21cm
Memory Foam Depth: 5cm
Memory Foam Grade: 50kg/m3 Premium
Firmness: Medium / Firm
Availability: Next Day

Latest Sleep King Memory Foam Mattress Reviews

  • Rated 5 out of 5
    Vanessa Stewart

    tremendous value and comfort - Excellent prompt delivery within 24 hours. Super comfortable, modest in price but tremendous value.

  • Rated 5 out of 5
    Cathryn Allen

    Much better than the first mattress I bought online, had to send that one back. Finally, I can get a decent night's rest.

  • Rated 5 out of 5
    Rebecca Kriese

    Simply wonderful :) x

  • Rated 5 out of 5
    Thomas Kershaw

    Such a good mattress worth every penny.

  • Rated 5 out of 5
    Ann Lemon

    Amazing mattress, so happy.

  • Rated 5 out of 5
    Lisa Neal

    Incredible. Never owned a better mattress.

  • Rated 5 out of 5
    June Higgs

    Very very happy. I had the whole mattress to myself this weekend and I'm secretly wishing I have the same next weekend

  • Rated 5 out of 5
    Rhiannon Leeming

    I've been long overdue a new mattress and wow! Why did I put this off so long?

  • Rated 5 out of 5
    Jennifer Parker

    What a wonderful mattress and a wonderful price to go with it.

  • Rated 5 out of 5
    Ann Frear

    much more supportive than the mattress I used to have.

  • Rated 5 out of 5
    Emma Pond

    Looking forward to tonight on this mattress

  • Rated 5 out of 5
    Paula Hills

    Wonderful! If you're in two minds, buy it. Highly recommended.

  • Rated 5 out of 5
    Garry Lewis

    I didn't think it was possible to fall in love with a mattress.

  • Rated 5 out of 5
    zoe palmer

    i thought they'd delivered the wrong thing first as it came rolled up should have seen my face lol

  • Rated 5 out of 5
    Simon Atherley

    Fast delivery and good quality, hope it lasts.

  • Rated 5 out of 5
    Joe Bagley

    If you love sleep you'll love this mattress.

  • Rated 5 out of 5
    Patricia Hill

    Can't recommend this mattress more highly to people.

  • Rated 5 out of 5
    Keith Clement

    This is an impressive mattress considering how little it costs in comparison to some of the big name brands. Just goes to show!

  • Rated 5 out of 5
    Jason Gray

    This is a well-made mattress and the price doesn't reflect it. I would honestly have paid more and still been happy.

  • Rated 5 out of 5
    Keith Wood

    Arrived rolled up, which made it easier to move it upstairs. Great mattress.

  • Rated 5 out of 5
    David Stewart

    slept like a baby, thanks GB

  • Rated 5 out of 5
    Betty Cook

    Wow, I'm really impressed with how comfortable this mattress is, I've had one of the best nights sleep in ages.

  • Rated 5 out of 5
    Lisa Stevens

    Fantastic quality mattress, had one of the best nights sleep I've had in years.

  • Rated 5 out of 5
    Arthur Walker

    Lovely and comfortable.

  • Rated 5 out of 5
    Jesse Hall

    My goodness this wasn't what I was expecting, after going from bed shop to bed shop I was a little dubious to order online but so please that I did. fantastic work.

  • Rated 5 out of 5
    Craig Harris

    Quick and easy delivery thanks

  • Rated 5 out of 5
    Theresa Turner

    I'm amazed by how much more comfortable foam is rather than old sprung mattresses

  • Rated 5 out of 5
    Mark Patterson

    very comfortable and quick delivery

  • Rated 5 out of 5
    Larry Barnes

    best night sleep I've had in years

  • Rated 5 out of 5
    Heather Richardson

    really comfortable - nice job GB foam

  • Rated 5 out of 5
    James White

    This mattress is top quality, it's so much better than my old sprung one

  • Rated 5 out of 5
    Rachel Edwards

    Haven't tried it yet but delivery was fast and service was great.

  • Rated 5 out of 5
    Terry Smith

    Exceeded my expectations. Glad I went for this one in the end, saved myself a fair few quid.

  • Rated 5 out of 5
    Neill Ward

    super comfortable, I would recommend this mattress to friends.

  • Rated 5 out of 5
    Chris Watson

    Considering buying a couple of singles for the kids after buying this one.

  • Rated 5 out of 5
    luke fields

    Superb nice and comfy

  • Rated 5 out of 5
    Lee Greenwood

    Fits our sleigh bed. Arrived super quick as well. Very happy with the purchase!

  • Rated 5 out of 5
    Grace Mellor

    Perfect. Sleeping much better since owning this. Thank you

  • Rated 5 out of 5
    Adam Kelley

    Fitted our bed frame perfectly. Bought a few of your mattresses for a project at work and thought I would treat myself. Was definitely worth the money.

  • Rated 5 out of 5
    Oscar Hayes

    The best mattress I've ever owned without a doubt.

  • Rated 5 out of 5
    Ethan Swift

    Fantastic memory foam mattress. I'd go as far as to say this is the best mattress I've ever owned.

  • Rated 5 out of 5
    Liam Wade

    Very high quality for the price. This is the first memory foam mattress I've owned and so far I am impressed with the results.

  • Rated 5 out of 5
    David Hill

    Brilliant mattress for the price, I've been sleeping so much better since having it.

  • Rated 4 out of 5
    Sarah Butler

    Much better than I thought it would be. Was a little firm at first but is beginning to break in

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Why Choose GB Foam For Your Foam Cut To Size?

Our factory is equipped with the latest CNC cutting technology and throughout the years we have employed the most talented freehand foam cutters in the industry. Many members of the team have worked for the company for several decades and their attention to detail and quality control is something that only comes with years of knowledge and experience.

We have many customers who started with us in 1976 and are still working with us today, which we like to think reflects on our vision to be the most dynamic foam converter in our industry. For us no job is too big or too small. We offer the same level of service and delivery whether you are a retail customer ordering one piece of foam from home, or a large manufacturer ordering daily.

GB Foam Celebrating 40 Years in Business
40 Years In BUsiness

GB Foam have been offering foam cut to size from our factory since 1976.

Foam Made In The UK
Hand Made In THe UK

We employ the most talented freehand foam cutters in the industry.

Foam Made In The UK
ISO 9001 Quality

Our team work to the ISO 9001 quality standards to guarantee only the best

Super Fast Foam Delivery
Super Fast Delivery

All orders placed before 11:30am will be despatched for next working day delivery

5 Year Foam Guarantee
5 Year Guarantee

Our foam comes with a 5 year guarantee against faults in manufacture.

Flame Retardant Foam
Flame Retardant

Our entire range of foam exceed UK safety and flammability standards.

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