VS
Sealy logo banner
Coolflex logo banner

Sealy vs Coolflex Mattresses

Want Mattress is supported by readers. Some links on Want Mattress are referral links. If you use one of these and buy something, Want Mattress may make a small amount of money. More info .

Sealy

Sealy has formerly separated from Silentnight, who once managed the UK arm of the popular retailer and will now be re-acquired by Tempur Sealy International. For those who don’t know, Sealy is the world's biggest bed brand that’s not down to luck, Sealy mattresses are highly regarded and at a price point that is achievable for the vast majority of people. What’s more, the company produces handmade beds right here in the UK using some of the finest fillings and upholstery.

Sealy’s Posturepedic technology makes it ideal for those with back and neck pain looking for that additional bit of support, becoming the only partner to be approved under the Orthopedic Advisory Board

Read our full Sealy review

Coolflex

Coolflex is a value hybrid mattress range sold exclusively through MattressNextDay. The brand has grown from a single rolled mattress into a catalogue covering multiple construction types with a specific focus on cooling technology at accessible pricing. The range includes the Essentials Pocket Memory Hybrid, Premium Memory Hybrid, Hybrid Ice, Hybrid Chill and Lux Ortho Pocket, each targeting a different buyer profile.

What makes Coolflex worth looking at is the combination of proper pocket spring hybrid construction with cooling-focused materials at prices that undercut the major direct-to-consumer brands. For hot sleepers shopping on a budget, Coolflex is one of the first alternatives to consider.

Read our full Coolflex review

Mattress Score

Overall Score:
Sealy: 4.67/5.00
Coolflex: 4.10/5.00

Price:
Sealy: £277.00 - £3899.99
Coolflex: £149.00 - £399.00


Based on aggregated reviews and performance scoring, we would recommend Sealy in this face off!


Becky
Compares

Sealy Owner Satisfaction

Satisfaction is at the heart of what Sealy offers. Since their inception Sealy has offered numerous different base and comfort layers to try and appease all areas of the market. The company has largely remained successful in their plight thanks to their strong support within the mid-tier market. Customers are most satisfied with the company's firm orthopaedic mattresses, for which they have become renowned.

Sealy Supportiveness

The Sealy lineup includes everything from soft through to firm tensions. The most popular in the range are the mediums which give the best overall support for most people, pairing well with the pocket spring support layer to offer full body contouring for all-round support without feeling too-firm.

For those looking for a bit more support, Sealy has firmness grades exceeding firm and entering extra-firm territory. We would personally recommend these only for specific circumstances as comfort is reduced slightly to better aid support.

Sealy Durability

When it comes to durability Sealy performs in line with expectation. We do see a bit of fallout from some of the cheaper in the range, particularly the open coil sprung models which, combined with a single sided comfort layer often do not have long-lasting properties and may not afford as good value as initially perceived due to their reduced operating lifespan. Contrary to this is the excellent pocket sprung options on offer from Sealy, particularly when paired with a double sided comfort layer. A combination of these will ensure you get a long standing mattress that will last far better and in-line with the average expectancy where people typically look at replacing their mattress (7 years)

Sealy Best Offers

We've managed to find the following top deals from across the web on Sealy mattresses.

Coolflex Owner Satisfaction

Coolflex reviews are consistently strong on two specific points: the cooling performance is real rather than marketing decoration, and the value for money at this price tier is hard to beat from the mainstream alternatives. MattressNextDay handles delivery and returns reliably, which gives the buying experience a stable foundation that standalone budget brands often lack.

Hot sleepers are the buyer profile most likely to rate Coolflex highest, because the cooling technology in the Hybrid Ice and Hybrid Chill models delivers a measurable difference from standard foam alternatives. The main complaint pattern we see relates to edge support on the entry-tier models, which improves as you step up through the range.

Coolflex Supportiveness

The pocket spring cores across the Coolflex hybrid range provide genuine structural support that pure foam alternatives at similar prices typically lack. The Premium Memory Hybrid is the sweet spot for most buyers, with a spring count and foam layer depth that handles average weight sleepers across back and side positions comfortably. The Lux Ortho Pocket handles the firmer end for stomach sleepers and back pain sufferers.

The Hybrid Ice and Hybrid Chill add cooling layers on top of the pocket spring base and are the models to look at specifically for hot sleepers who want temperature regulation alongside the hybrid support structure.

Coolflex Durability

The pocket spring and foam hybrid construction that Coolflex uses across the range is the build type we generally expect to last longest at this price tier. Pocket springs provide structural longevity that all-foam alternatives cannot match, and the foam layers above use reasonable densities for the price point. MattressNextDay backing gives the brand a retail infrastructure that supports warranty claims.

As a newer brand, the long-term durability data is limited compared with heritage manufacturers like Silentnight or Sealy, but the construction approach is sound and the early-year review data is consistent with what you would expect from a well-made hybrid at this price.

Coolflex Best Offers

We've managed to find the following top deals from across the web on Coolflex mattresses.

Sealy Most Useful Customer Reviews

5 T Phillips

I’ve been sleeping on this mattress for a few nights now and I’m pleased to say it’s making a positive difference. I was hoping for something supportive and comfortable, and this mattress delivers on both fronts. What I like The medium-firm feel hits a nice balance: not so hard that you feel like you’re lying on a plank, yet firm enough to feel properly supported. The product’s description calls it “medium-firm” and highlights the balance between support and plushness. The cooling feature is visible: the mattress uses INFUSE™ Black Diamond Graphite foam (which I must admit sounded fancy to me) to help with temperature regulation. According to the spec it “keeps you cool while cushioning your hips and back”. On warmer nights I’ve noticed I’m less restless. Excellent support for back and hips: I wake up without the usual niggles around the lower back and shoulders that I used to get with older mattresses. The “AlignSupport® coils” and plant-based ComfortCore layer appear to be doing their job. Good edge support: the mattress doesn’t feel as though you’ll roll off when you get close to the edge, and the usable surface feels generous. That’s helpful when two of us are sharing it. Quality and build: the cover feels robust, the stitching seems neat, and while I won’t pretend to have dismantled it, it gives a sense of quality rather than a bargain compromise. Where there’s room for improvement (or things to know) It’s a bit heavier/setup-intensive than my old one: rotating or manoeuvring it takes a bit of effort. If you prefer a super soft, sinking-in feel (the “body-hug” kind) this mattress might feel a little firm. Some reviews of the same family of mattresses note that side-sleepers (especially lightweight ones) might find medium-firm less contouring than they’d like. As with many new mattresses, there was a short adjustment period for my body clock and sleep-muscles to adapt. The first two nights felt slightly unfamiliar; by night three I was into it. Cooling is better than my previous mattress, but if you’re a very hot sleeper I wouldn’t say it’s magic. The spec claims better temperature control but some users of related models still noted some heat retention. Verdict In my view this is a strong pick if you want a mattress that blends support with comfort, especially if you’ve got a back that lets you know when the mattress is doing a poor job. For someone like me (part-time mystic, allotment keeper, old bones) it feels like a good investment in sleep rather than just a piece of furniture. I’d say I’m waking up more rested, and that alone makes the change worthwhile.

5 Jeffrey N

Lying on a bed in a shop fully clothed for a few minutes is one thing. Lying on it for 8 hours in thin nightwear is something else. I tried the Newton bed in the shop and it seemed comfortable, although it may have been there years and hundreds of customers may have bounced on it. Once delivered (and Bensons were totally professional in that regard) I got backache after one night. Others have remarked their bed seemed firmer than in the shop. Dreams sell the same mattress but they call it Hagen and rate it very firm which it certainly is. I found I could get my hands behind the small of my back and exactly the same when I lay on the floor !! I also got cubital tunnel syndrome (hard bed pressed on shoulder and elbow causing pain down arm and little finger went numb !) A topper improved things a bit but if you need a topper to make your bed comfy you're probably lying on the wrong bed ! After a week of pain I decided to switch to a medium Newton which you wouldn't know existed if you only went in the store and didn't look online. I zoom called Bensons HQ who confirmed none of their shops displayed it. So why didn't I order a medium in the first place ? I didn't like the idea of buying a bed I hadn't tried first (if that is any guide) but in the end I was forced to ! Now medium doesn't mean soft. It just means slightly less firm !! I phoned Sealy HQ who explained the only difference is Newton Medium has firm and medium foam, not extra firm foam like their firm version. I'd give Newton firm a 9/10 rating for firmness and Newton Medium 7/10 although that may ease to a 6 in a few months. Incidentally I did consider the Bronte too. I had a pillow top but found it got frayed and torn after 6 years (I'm a restless sleeper), was heavier to turn, higher and the sheets didn't fit. As others have mentioned I found it warm to lie on after just 10 minutes so wondered how hot it would be after 8 hours. To be brutally honest I didn't think it worth an extra £400 which is a lot for a pensioner ! If you want a soft top buy a mattress topper for the Newton Medium and save yourself the extra expense. A final point, I found the Newton Medium somewhat lighter than the firm, probably due to the lack of hard heavy-duty foam.

5 Jeffrey N

Lying on a bed in a shop fully clothed for a few minutes is one thing. Lying on it for 8 hours in thin nightwear is something else. I tried the Newton bed in the shop and it seemed comfortable, although it may have been there years and hundreds of customers may have bounced on it. Once delivered (and Bensons were totally professional in that regard) I got backache after one night. Others have remarked their bed seemed firmer than in the shop. Dreams sell the same mattress but they call it Hagen and rate it very firm which it certainly is. I found I could get my hands behind the small of my back and exactly the same when I lay on the floor !! I also got cubital tunnel syndrome (hard bed pressed on shoulder and elbow causing pain down arm and little finger went numb !) A topper improved things a bit but if you need a topper to make your bed comfy you're probably lying on the wrong bed ! After a week of pain I decided to switch to a medium Newton which you wouldn't know existed if you only went in the store and didn't look online. I zoom called Bensons HQ who confirmed none of their shops displayed it. So why didn't I order a medium in the first place ? I didn't like the idea of buying a bed I hadn't tried first (if that is any guide) but in the end I was forced to ! Now medium doesn't mean soft. It just means slightly less firm !! I phoned Sealy HQ who explained the only difference is Newton Medium has firm and medium foam, not extra firm foam like their firm version. I'd give Newton firm a 9/10 rating for firmness and Newton Medium 7/10 although that may ease to a 6 in a few months. Incidentally I did consider the Bronte too. I had a pillow top but found it got frayed and torn after 6 years (I'm a restless sleeper), was heavier to turn, higher and the sheets didn't fit. As others have mentioned I found it warm to lie on after just 10 minutes so wondered how hot it would be after 8 hours. To be brutally honest I didn't think it worth an extra 400 which is a lot for a pensioner ! If you want a soft top buy a mattress topper for the Newton Medium and save yourself the extra expense. A final point, I found the Newton Medium somewhat lighter than the firm, probably due to the lack of hard heavy-duty foam.

5 Sally

I spend a lot of time in bed due to a chronic disability and my husband suffers from back and hip pain. I have previously bought Sealy mattresses so when we needed a new one we bought this Sealy mattress. Initially it may seem expensive but when you're in terrible pain 24/7 this is by far the most comfortable mattress out there. Before buying Sealy 20 plus years ago I felt as if my mattress was attacking me! What a blessed relief to find this one. My husband was rather shocked at the price but the next day the first thing he said was "wow, my pain has gone" when you consider how long you're in bed over a life time a good mattress is so important and the cost over the years pays for itself. I honestly can't recommend this highly enough. Always buying from Bensons has made the experience a pleasure from visiting the show room, laying on the mattresses (for hours!!) very knowledgable sales personnel, through to delivery and taking out old mattress away was excellent. Once you've "found the one" you'll not want to go anywhere else!! Do swivel your mattress regularly as it will increase its lifespan! It's easy to do! I use a good mattress protector first, then my electric blanket, then a second mattress protector followed by a fitted sheet etc. My last Sealy mattress lasted 12 years, baring in mind I'm in it 85% of the time. It should be changed sooner but the guys couldn't believe how great it still looked. My daughter, in her 30's also has a similar mattress and finds it helps her aches too. Always buying a suitable base to put your mattress on! I have a very soft brush that we use to gently brush the mattress to remove any dust etc. it also has plenty of hand grips to use when swivelling the mattress around so you're not always sleeping on same area and my husband does this every time the bedding is changed, you care for your mattress and it'll take care of you!!

5 Dan M

I've struggled with my sleep for years. I've had memory foam mattresses, I've tried multiple different toppers but always awoke in the night either with back pain or to feel myself sliding off the edge. Out last mattress was an improvement but after having out first child and being condemned to sleeping on the lip of the bed I decided enough was enough. We were getting a Super King bed and getting an actual good mattress! We went to Bensons and tried out a myriad of options. Naturally I was drawn to the most expensive option but I couldn't justify spending close to £5000 on a new bed. We tried the Sealy Newton Posturepedic Mattress and after laying on it for about 10 minutes I knew I'd found the one. It was extra firm and supported me in every position. It was love! We bought it from an Outlet store in Doncaster and got an unbelievable deal on it and even managed to get it delivered the next day. Getting it upstairs was a struggle and as it was being bent I was a bit apprehensive that it wouldn't bounce back. My nerves were settled as soon as it was on the bed frame. No issues what so ever. I was expecting a few nights to get adjusted to it but that evening something magical happened. I slept like a baby! No issues; no waking up with an aching back, no feeling like falling due to the reinforced edges, no waking up feeling fatigued still. We've had the bed for a fortnight now and I don't think I've slept so well in a long time. My Samsung watch is also saying my sleep is on the "excellent" rating. I'm massively impressed in this mattress, I'm enjoying having some actual space in bed due to upgrading to Super King size. If you're in the market for an extra firm mattress that holds you and supports you I highly recommend this one. We also adopted the having separate duvet covers that the Scandinavians do and this has also helped.

Coolflex Most Useful Customer Reviews

4 Zoe91

Generally appreciative of the superior back support offered by this piece although individual spring design occasionally falls short on expected comfort levels. Overall, exceptional orthopaedic advantages and satisfactory pressure relief makes it a worthwhile purchase.

4 Spencer Hughes

Really can't complain about this mattress. It's provided me with solid support, I wake up feeling refreshed each morning. Ideal for us folk who sleep on our back.

4 JRCollins

Really loved the quality of the mattress, it's comfortable and offers good support as promised. Nice, cool and refreshing - definitely improved my sleep.

5 NewDave

Relishing the quality, the comfort level is just splendid. It truly enhances my nightly set-up, giving the refreshing sleep my body needs.

4 Sleepy5

After weeks of using this, I can say it's pretty comfortable. The memory foam contours my body well, offering decent support and comfort.

Decorative award symbol in corner
Mobile award badge

Introducing our WantMattress Better-Sleep Award

Looking for a new mattress? Our experts have tried and tested the best UK mattresses for back, side, and front sleepers from Eve, Emma, Origin, and more top brands.

Quantitative measurements icon
New Quantitative Measurements
Head-to-head comparison icon
Radar Analysis Head to Head
Suitable for different sleeper types icon
Who This Mattress Will Suit
Sleep experts' approval icon
Why our sleep experts loved it