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Arthur Sleep King Arthur Mattress

4.8/5
Generously deep at 34cm, it teams 2000 pocket springs with memory foam and a soft box pillow top for medium-firm comfort.
iconMedium Firm
icon20mm Memory Foam
icon2000 Pocket Springs
icon34cm depth
  • Luxurious Extra Deep Mattress
  • 20mm Additional Soft Foam Layers
  • Soft Foam Box Pillow Top
  • Vacuum Packed for Easy Moving
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£429
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Description
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Available in 12 Showrooms
10 Year Warranty
Flexible Credit Options
The Verdict

What 558 sleepers really think

Rated 4.8/5 from 558 verified reviews
The Arthur Sleep King Arthur mattress is highly praised for its exceptional comfort and ability to improve sleep quality, especially for those with back or shoulder pain. Many users found it supportive and reported a reduction in pain, with the comfort level often exceeding expectations. The mattress's construction, including its depth, contributes to its overall support, although its weight can make changing sheets challenging. A few users noted that the firmness might not suit everyone.

AI-generated from the text of customer reviews

Why This Mattress

Why buy the Arthur Sleep King Arthur Mattress?

Every mattress is different. Scan for the ones that sound like you — if two or more fit, this is your mattress.

Best For
All Positions
Side one night, back the next?
A balanced feel that supports you whether you sleep on your side, back or front.
Helps with
Disturbance
Partner tosses and turns?
Springs that move independently absorb motion, so a restless partner is far less likely to wake you.
Helps with
Allergies
Wake up itchy or sneezy?
Hypoallergenic fillings and covers help keep dust mites and allergens at bay - ideal for allergy-prone sleepers.
Helps with
Pressure Relief
Achy hips or shoulders?
Cushioning comfort layers spread your weight evenly, easing pressure around hips and shoulders.
Thermal Control
All Season
Hot in July, cold in January?
A balanced build that doesn't run hot in summer or cold in winter, so it works all year round.
Helps with
Anti Bacterial
Freshness a priority?
A treated finish that stops bacteria building up, keeping things fresher and more hygienic for longer.
Helps with
Anti Microbial
Musty smells worry you?
Resists the microbes that cause mould and odours, helping the sleep surface stay clean and fresh.
How It Feels

How firm is it?

Medium Firm

Medium Firm is the level of support to the body, suitable for average to heavily weighted people. This is not a comfort rating.

About the Brand
4.82 brand rating

Arthur Sleep is an exclusive brand offering convenient, low-maintenance mattress solutions for all sleepers. With innovative pocket sprung and memory foam hybrids, they prioritize comfort and support. Featuring 100% hypoallergenic materials and a Which? Best Buy endorsement, Arthur Sleep ensures quality and restful nights for years.

View all Arthur Sleep
Real Sleepers

What our customers say

4.8
Product Rated 4.8 Stars
558 reviews
Average Customer Ratings
Comfort4.8
Durability4.8
Quality4.9
Value for money4.8
Rating Snapshot
5 stars
496
4 stars
44
3 stars
8
2 stars
6
1 stars
4
Customer Photos
Customer AttachmentCustomer AttachmentCustomer AttachmentCustomer AttachmentCustomer Attachment
Excellent496
Great44
Average8
Poor6
Bad4
Neil Williams
Customer Rated This 5 Stars 5/5
13 Jul 2026
My review for this mattress comes with the proviso that I have only owned and slept on it for about 4 weeks and so cannot comment on its durability and long-term comfort. That said, I have been delighted by this mattress from day one, particularly in respect of its quality and comfort for the relatively modest price versus the 3-times as expensive Hypnos mattress I was used to (a Hypnos Orthopedic Platinum which despite having a 10-year guarantee was shot at after just 4 years!). I was very impressed with how quickly and efficiently Mattressman retailers packaged and speedily delivered my European single King Arthur mattress (which was a replacement for my half of a Super-King-size bed). The one-time careful opening of the compressed and vacuum-packed mattress was fascinating and I left it 24 hours before sleeping on it as instructed. I was then very pleased that my sleeping improved markedly from day one and has continued ever since. It is a very comfy and supportive mattress, and incredible value for money. Time will tell how robust and durable it will be after a year or two of it being pounded by my 16+ stone weight as a side sleeper, but early indications are good ... and quite frankly, I have wasted so much money on expensive mattresses that are no better and often significantly worse which take ages to bed in properly and become comfy, and so I am now a King Arthur mattress and Mattressman convert. So if you want a comfy mattress that is good to go from day one and at a very reasonable price with fast and free delivery, I can highly recommend this mattress and manufacturer/retailer.
Comfort5
Quality5
Value5
Jacky Barber
Customer Rated This 5 Stars 5/5
22 Nov 2023
The last mattress I bought I tried loads and went to lots of bed showrooms, finally I thought I had found the perfect mattress however it’s never been as comfortable as the one in the showroom and It cost £1,500, I question if the show room mattress was actually the same as the one I had delivered. This was not from Mattress man. The Arthur sleep king mattress I bought from Mattress man because of the great reviews online and the great price. I didn’t try before delivery and i’m not disappointed, it’s really comfortable just like all the reviews said. I have slept so much better and with less pain. ( I have back problems) plus mattress man do a 60 day trial if you’re not happy you can return up to 60 days after. So I felt more confident to buy without trying first. Also Mattress man service has been fantastic, Great communication from ordering to delivery. Please be careful though when taking the mattress out of the plastic wrapper as it arrives rolled up approximately 30cms x 135cms ( double bed ) also make sure there’s no children in the room and don’t stand in front of the mattress go as far to the side as possible to open as when my mattress was opened on the bed base at arms length it sprung open and jumped about 3ft off the bed forwards and upwards. This mattress is about 35 cms deep once the springs and top have fully expanded and very heavy so could easily cause serious injuries if you stand too near when opening. I would definitely recommend this mattress but not if you like a really soft mattress. it’s more medium than firm but definitely not soft.
Comfort5
Durability5
Quality5
Value5
Gail Sheard
Customer Rated This 5 Stars 5/5
31 Jul 2025
The first night i thought i had made a hugh mistake as I woke up with an aching back and hips, but I now know that this was my spine aligning itself to its correct position with the help of this magnificent bed. I have ongoing spine problems and awaiting a hip replacement but this bed has/is a game changer for me. I would say the bed is true to what it says, medium firm. You can push the matress down with one hand but you notice that the memory foam topping cushions it. Thus giving support but enough 'give' so that the spine and hips are not subjected to too firm a mattress which can actually cause more damage to the joints. The depth of the mattress is sumptuous approx 20cm and the stitching and composition look very professionally done. It is quite a heavy mattress for me, I'm 5ft4 and 9st 7, so I will have to ask my son to turn it around after 6 months. It is not reversible and I am glad about this. I can't comment on the durability as I've only had it for 10 days, but I must say that this mattress is fabulous and exceeded my expectations, and I am truly happy I purchased it. Thank you.
Value5
Quality5
Comfort5
L ynda ann Pemberton
Customer Rated This 5 Stars 5/5
12 Apr 2026
I have been suffering from lower back pain for the past year, I am small and slim and have a very hollow back. When I was getting out of bed in the morning the pain was very bad and I couldn't straighten up. I put a wooden board under my mattress and I could straighten up after that but my back was still painful all the time. I bought the king Arthur Mattress which arrived the day after ordering, it's very high which makes it easier to get in and out of bed. The first night I didn't sleep at all, the second and 3rd night's sleep were a little better by the fourth night I slept really well and have been sleeping quite well ever since, which is amazing for me as I have suffered with insomnia since I was a baby, I don't go bed until 2.am and I get up at 6 am but since having this mattress, I have been going to bed earlier and getting up later for the first time in my life. My back pain has improved by 90%. I have only had it for, three weeks so I hope this will keep up.
Quality5
Comfort5
Value5
Anita Ford
Customer Rated This 5 Stars 5/5
09 Sep 2025
Really impressed with this mattress. (3’ Single). Delivered on time by a very polite man. Followed instructions about unpacking. I still can’t believe this deep mattress was packed in a box. I have slept better every night so far. It is such an improvement on my old mattress. I use a topper as well. It feels like a quality product to lay on. I would say it is medium/firm. I need this as I have arthritis in my lower back and also a newish hip. It fitted my base perfectly. I must add that it the mattress is much higher than my old one. My feel don’t touch the floor unless I sit right on the edge. I’m 5’6. I even had to buy another set of steps for my little rescue dog, as she couldn’t get up. She also loves it too. Would highly recommended this for a single mattress. Very happy with my purchase.
Value5
Comfort5
Durability5
Quality5
Natasha Goodman
Customer Rated This 5 Stars 5/5
17 Jun 2025
After initially being a bit concerned about ordering a mattress online without seeing it beforehand, I needn’t have worried at all. This mattress is incredible. It is soft enough for me as a front sleeper, and supportive enough for my partner who is a side/back sleeper. It’s unbelievably comfortable, our sleep has improved so much and neither of us are waking up with aches and pains anymore. I wish I’d bought it sooner. It is a very deep mattress so had to buy new sheets but well worth it for the comfort. Unrolled and in shape within an hour but we left it for the day to air out. There was no smell at all when the mattress was unwrapped. Happy with delivery too, was able to track the item and it was delivered to room of choice and old mattress recycled with no issues.
Comfort5
Value5
Quality5
Viewing 1 to 6 of 558
Our Promise

The King Arthur Mattress has

A 60-night sleep trial Sleep on it at home — love it, or exchange it between nights 30 and 60.
A 10 year warranty See exactly what's covered, and for how long.
Price Match Promise Seen it cheaper somewhere else? We'll match it.
·
Good To Know

Frequently asked questions

Is the King Arthur mattress suitable for allergy sufferers?
Yes, the King Arthur mattress is recommended for allergy sufferers due to its specific fillings and fabric, which help reduce allergens.
How does the pillow top on this mattress differ from a traditional mattress?
The pillow top effect on the King Arthur mattress looks like a separate layer but is actually attached with a hidden return, offering additional soft fillings for enhanced comfort.
What kind of support does the pocket sprung system provide?
The pocket sprung system features individual springs that are encapsulated in fabric, allowing them to move independently for body moulding support, preventing roll together and ensuring a quiet night's sleep.
How should I handle the mattress when setting it up?
The King Arthur mattress comes with handles attached to the border, which makes it easier to rotate and turn as needed.
What is the thickness of the King Arthur mattress and how does it contribute to comfort?
The King Arthur mattress features a luxurious extra deep design, ensuring a thickness that provides substantial comfort and support. This thickness includes 20mm of additional soft foam layers atop the mattress, which enhances pressure relief and body contouring, allowing for a more restful sleep experience. The combination of deep pocket springs and foam layers also helps in distributing weight evenly, further contributing to overall comfort.
Does the King Arthur mattress require turning?
This mattress is one-sided, so it does not need to be turned, but regular rotation is recommended to maintain even wear.
What materials are used in the King Arthur mattress?
The King Arthur mattress features luxurious extra deep foam layers, a knitted cover for elasticity, and a combination of soft foam and memory foam for comfort.
How does the micro quilted finish benefit the mattress?
The micro quilted finish creates a patterned comfort quilt layer by stitching the fabric and fillings together, enhancing the overall comfort of the mattress.
What is the warranty period for the King Arthur mattress?
The King Arthur mattress comes with a 10-year warranty, providing peace of mind regarding its quality and durability.
What is the significance of the 2000 pocket springs in the King Arthur mattress?
The 2000 pocket springs in the King Arthur mattress play a crucial role in providing tailored support and comfort. Each pocket spring operates independently, allowing the mattress to contour to the shape of your body while promoting even weight distribution. This design minimises motion transfer, ensuring that movement on one side of the mattress does not disturb the other side, making it ideal for couples.

60-night sleep trial: exchanges only, not refunds. Activated by purchasing a mattress protector at the point of order. Request your exchange between nights 30 and 60 of the trial; a £50 exchange fee applies. Full terms.

Recommendation rate: the percentage of verified Trustpilot reviews for this product with a rating of 4 stars or more, rounded down.

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