Sealy Newton Posturepedic Mattress

Name: Sealy Newton Posturepedic Mattress
Brand: Sealy
SKU: STK801502
Price: 1399.99 GBP
Availability: InStock
Rating: 4.3 (9 reviews)

4.71 (564 reviews)

In-stock
Finance available
Free delivery
Returns

Feature: Hypoallergenic
Comfort: Latex
Feel: Medium
Brand: Sealy

From £1399.99 , last checked 25 May 2026

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Suitability

Back + Side Sleepers

Support with enough compression to accomodate most sleepers.

Suitability

Temperature

Not too hot, nor too cold with this composition.

Suitability

Allergies

Composition of this mattress has features to help with allergies.

BedBoy Score

A composite score drawn from aggregated customer sentiment across verified reviews, with construction-type benchmarks for categories where reviewer commentary is limited. See our scoring methodology.

4.3/5

BedBoy Score
across 9 measured categories

Per-category breakdown below. The composite is the unweighted mean of every scored category, rounded to one decimal place.

Strongest on comfort and durability; weaker on retailer guarantee.

Comfort 5.0/5 Show evidence for Comfort
Comfort scored 5.0/5 from 559 verified reviews: 214 positive mentions and 10 negative mentions (net signal +36.49%).
- “Would definitely recommend my Sealy posturepedic mattress it is so comfortable. I love it.”
- “Wonderfully comfortable from day 1. Truly supportive and lower back has definitely benefited from the right firmness.”
- “What a superb mattress! I was a tad hesitant because of the price but my partner insisted as I am a very hefty 18 stone. Great support all over not just the sides.”
Durability 5.0/5 Show evidence for Durability
Durability scored 5.0/5 from latex construction. Reviewer commentary specific to durability was limited (5 relevant mentions across 559 reviews) so the score relies on construction type.
- “This mattress is the best I've ever slept on. I purposely chose a very firm mattress in order to have sufficient support across the entire surface. This was particularly crucial at the edges. When seated at the edge I am particularly pleased that there is absolutely no sagging. I am enjoying a full ”
- “The Sealy mattress which carried a 10 year guarantee started with uncomfortable sagging after just under a year. It quickly progressed to the hard plastic springs making it like a bed of nails. An assessor came, accepted there was an issue however because we 'flipped' the mattress and slept on t”
- “Reasonably comfortable but not as comfortable as expected for the cost. Springs squeak when moving in bed and mattress seems to be already sagging slightly.”
Off-gassing and setup 5.0/5 Show evidence for Off-gassing and setup
Off-gassing and setup scored 5.0/5 from non-compressed traditional construction. Reviewer commentary specific to off-gassing and setup was limited (3 relevant mentions across 559 reviews) so the score relies on construction type.
- “Very comfortable and makes a huge improvement to sleep. Not five stars as there is a strong chemical smell which after several weeks is only now starting to die away.”
- “Has been a month since purchase. Pros: - Mattress is firm and high, provides good support - Good customer support and information from Bensons when purchasing the mattress Cons: - Has a very strong chemical smell initially, took about a week to neutralise - Very heavy mattress, makes rotating a ”
- “Bensons for beds have been extremely helfpful in finding a mattress for my husbands back problems, even in time for Christmas! However, I find that the Sealy Posturepedic still has quite a strong smell, even after a month of opening windows, trying the baking soda trick, and using the lavender spray”
Customer sentiment 4.7/5 Show evidence for Customer sentiment

Customer sentiment scored 4.7/5 from an average star rating of 4.71 across 564 verified reviews.
Heat retention 4.5/5 Show evidence for Heat retention
Heat retention scored 4.5/5 from latex construction. Reviewer commentary specific to heat retention was limited (5 relevant mentions across 559 reviews) so the score relies on construction type.
- “Good shape retention Retains heat well good night's sleep”
- “Good firm mattress. Best sleep I have had in years. The mattress is very well made, as you would expect from Sealy, nice and cool, supportive where i need it. I think it can take a week or two to adjust to the level of firmness this mattress provides, especially coming from a memory foam mattress.”
- “Found the mattress very comfortable and supportive, no back pain, and firm sides were very good. However, a BIG problem encountered. I am a 'hot sleeper' and found that despite the supposed ventilation from the springs, the depth of the multiple foam layers was nevertheless enough that I was waking ”
Pressure relief 4.5/5 Show evidence for Pressure relief
Pressure relief scored 4.5/5 from latex construction (editor-vetted for pain suitability). Reviewer commentary specific to pressure relief was limited (8 relevant mentions across 559 reviews) so the score relies on construction type.
- “Very comfortable, I have a sore back and it's the best mattress I've ever used”
- “he Sealy Newton Posturepedic Mattress offers unparalleled comfort, providing a delightful sleep experience. Its plush surface and innovative design ensure optimal support and pressure relief, promoting restorative rest night after night. With its superior quality and ergonomic features, it's a wise ”
- “Firm and comfortable. A great night's sleep, with no aches or pains during or after sleeping. Highly recommend!”
Motion isolation 4.0/5 Show evidence for Motion isolation

Motion isolation scored 4.0/5 from latex construction. Reviewer commentary specific to motion isolation was limited (0 relevant mentions across 559 reviews) so the score relies on construction type.
Edge support 3.5/5 Show evidence for Edge support
Edge support scored 3.5/5 from latex construction. Reviewer commentary specific to edge support was limited (8 relevant mentions across 559 reviews) so the score relies on construction type.
- “Quite firm for a 'medium' but comfortable and noticeably better than my old mattress. I was warned it would smell of fire retardant for a few hours but it has taken weeks for the smell to fade, despite regular airing and using bicarb on it. Uncertain about firm edges which won't give due to constr”
- “Only been sleeping on it for a month but good so far. Lovely firm edges, really good if you like to hang your arms over the side. Also good to sit on - not that we would do such a naughty thing.”
- “My main reason for purchasing it was for the firm edges. My wife needs them to help her stand from sitting on the bedside. It is great for her needs. The mattress is comfortable to sleep on even for side sleeping. Only time will tell how long it will remain so excellent. At the moment I would thorou”
Retailer guarantee 2.7/5 Show evidence for Retailer guarantee

Retailer guarantee scored 2.7/5: 40-night comfort guarantee, 1-year manufacturer guarantee, and paid collection of large items. Sub-scores: trial 3.0/5, warranty 2.0/5, returns 3.0/5.
Value Rarely mentioned Value: Rarely mentioned. Not scored on this product.

Brand: Sealy
Retailer: Bensons for Beds
Delivery time: Good
Customer sentiment: Average
Guarantee: Excellent

About the Sealy Newton Posturepedic Mattress

Last checked 25 May 2026

Buyers considering the Sealy Newton Posturepedic Mattress are buying on tension more than on a visible list of comfort ingredients, because the usable spec here is its medium, 3 of 5, feel. It is an accessible tension. Against extra-firm orthopaedic mattresses, that is a more forgiving call: the surface should allow more shoulder and hip sink before the support underneath pushes back, while still aiming to keep the pelvis from dropping too far. The Posturepedic name sounds clinical, but on this medium version the practical reality is balanced support rather than a corrective, board-like build, and that is an honest mainstream setting for a mattress aimed at broad use rather than a single sleeping style. Customer praise also points in that direction, with owners repeatedly talking about good support, firmer edges and less disturbance from bounce or noisy springs. The caveat is that “medium” is not being experienced as soft; several buyers describe the delivered feel as closer to firm than expected, so this sits nearer the supportive middle of the market than the plush, sink-in end of all-foam comfort mattresses.

The medium tension makes most sense for average-weight side sleepers who need pressure relief at the shoulder, with back sleepers getting adequate general support but not the flatter, firmer lumbar hold that some prefer. Couples get encouraging owner feedback: firm edge comments repeat, and recent buyers describe the mattress as stable in use, with little bounce and no spring noise troubling their sleep. Back-pain comments are broadly positive too, including owners who say aches improved after switching, which fits a medium support profile that avoids both deep hammock-like sag and the harsher feel of a very firm bed. Comfort mismatch is the main warning sign. A few unhappy buyers found the mattress very different from a short display-bed trial, and the listed medium rating does not fully match owner language that sometimes lands closer to firm; for sensitive sleepers, one severe odour complaint involving asthma and allergies belongs as a caution rather than a repeated pattern. A more serious durability account describes uncomfortable sagging within a year and a guarantee dispute after the mattress was turned, so rotation and correct-use guidance matter with this model. The strongest fit is an average-weight side sleeper, or a couple wanting steadier edges and moderate motion control; back sleepers wanting a firmer lumbar platform, smell-sensitive buyers and anyone wary of early sagging reports are better aimed at a firmer orthopaedic mattress or a higher-spec pocket-sprung tier with clearer durability credentials.

Pros and Cons

Pros

Provides excellent support with firm edges for a restful night's sleep
The quality of the mattress remains consistent regardless of sleeping position
Helps alleviate backaches and promotes better sleep quality
Many users report significant satisfaction with the overall mattress experience

Cons

Sagging issues reported within a year despite a 10-year guarantee
Some customers experienced unpleasant odours upon unboxing
May feel firmer than expected for those used to softer mattresses
Not a good fit for sleepers with specific allergies or sensitivities

Price Tracker

Price history requires JavaScript. Current price: £1399.99, last checked 25 May 2026.

Written by Monika Sharma, Senior Editor

Last checked by Monika Sharma on 25 May 2026. Scoring follows our scoring methodology.

Specifications

Manufacturer specifications without the jargon, easy to scan and compare.

Reader reviews of the Sealy Newton Posturepedic Mattress

BedBoy publishes reader-submitted reviews to broaden the sentiment sample. Reviewer purchase status is not independently verified at submission. For verified-purchase ratings, see the Trustpilot block below. Submit a review, quoting STK801502 in the subject line.

I C via Bensons for Beds

Yes, we both like this mattress. The quality is excellent. Which ever way you prefer to sleep the comfort remains the same. No bouncing around, no noisy springs. Firm and comfortable.

Chris L via Bensons for Beds

Yes we like it very comfy just what we needed o more backaches and a good nights sleep

Evelyn T via Bensons for Beds

Would definitely recommend my Sealy posturepedic mattress it is so comfortable. I love it.

Anne Ian E via Bensons for Beds

Wonderfully comfortable from day 1. Truly supportive and lower back has definitely benefited from the right firmness.

Christopher & Rachel G via Bensons for Beds

Wonderful supportive bed and great for my back. Great buy. Quality. Edge support very good.

Jennifer C via Bensons for Beds

Wonderful nights sleep had no problem sleeping on it from the first night. Very happy with the mattress

J M via Bensons for Beds

What a superb mattress! I was a tad hesitant because of the price but my partner insisted as I am a very hefty 18 stone. Great support all over not just the sides.

Linda K via Bensons for Beds

What a great purchase. Never slept better. Should have purchased sooner. Great product.

Margaret M via Bensons for Beds

We wanted to buy a mattress made locally, so we chose the Sealy Posturepedic and we are so glad that we did. The mattress and divan are wonderful. We are delighted with our new bed. Only one fault.... we don't want to get out of bed now in the morning. So comfortable and looks good as well.

John B via Bensons for Beds

We really like our new bed, it's firm, supportive, comfortable, cool during sleep. We wake up refreshed and both have a really good night's sleep. The edge support is great and makes it very easy to get in and out of bed, as the sides don't sag.

Scott B via Bensons for Beds

We purchased the Sealy Newton Posturepedic Mattress because we were not sleeping well and frequently woke up in pain. Since buying this mattress, we have experienced a significant improvement in our sleep quality. The mattress provides exceptional comfort and offers excellent support, which has made a noticeable difference in how we feel each morning. The combination of support and comfort has alleviated our previous discomfort, and we no longer wake up with aches and pains. Overall, we are extremely satisfied with our Sealy Newton Posturepedic Mattress and would highly recommend it to anyone seeking a restful and pain-free sleep experience

Andy B via Bensons for Beds

We purchased the Sealy Newton Posturepedic Mattress after several disappointing memory foam mattresses that claim to offer the best nights sleep, we were a little sceptical but any scepticism soon disappeared along with the poor nights sleep. We have never slept so peacefully and woke up fully rested in years as we do now. It's certainly the best mattress we've purchased and we'd highly recommend it along with The Portracl lane branch of Bensons who helped us make this important decision.

Gillian B via Bensons for Beds

We love this mattress, as soon as we tried it in the shop we knew it was the right one … lovely and firm and supportive and just what we were looking for. Great nights sleep. We have turned it around each week as advised to do while it settles, turning is fairly easy with the side handles. Overall it has made a big difference to our nights sleep.

Janice D via Bensons for Beds

We love it! It has helped with my sciatica. Firm, but the soft top finish makes it extremely comfortable. It was an instant success. Delivery was on time, very efficient , ten out of ten!

. O via Bensons for Beds

We love it it's in our holiday house so only had two sleeps on it. Very comfy and firm too!!

Rod And Sylvia S via Bensons for Beds

we have slept in the mattress for 27 nights and find it uncomfortable as we are both ending up in the middle of the mattress due to the external edges being rigid creating the 'bowl' effect.

G S via Bensons for Beds

We have only had the mattress for a few weeks but it is very comfortable. Firm but not too firm, and with good support.

Michael R via Bensons for Beds

We have found the mattress yo be exactly what was described and very comfortable.

Jennifer C via Bensons for Beds

We have been sleeping on the sealy Newton for a month now and find it comfortable individual positions as my partner is much heavier than me but I don't roll onto his side which is good giving me a comfortable position to sleep. I would recommend this mattress as a good quality reasonable priced choice.

Kim H via Bensons for Beds

We had known for a while that we needed a new mattress. This is the best thing we have bought in the last few years. So comfortable it makes for a good nights sleep!