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Simba vs Coolflex Mattresses

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Simba

Simba have been around for a long time originally founding in 1979, however, they have only been in the bed-in-a-box industry a few years at this point. Simba started its journey with one mattress before branching out to encompass an entire range. These aren’t just any mattresses though, and they have been tested using data from ten million sleepers’ body profiles and over 100 prototypes to help ensure that the mattress and its design will suit the vast majority of sleepers. To date the Simba lineup has become one of the most well-reviewed mattresses worldwide and with the new line-up, there's different models to suit different budgets.

Simba has an entire lineup dedicated to bed in box rolled mattresses. This avenue to market has become increasingly popular in recent years and has numerous benefits, namely that the cost of the product is typically lower due to savings within logistics warehousing and delivery.

Read our full Simba 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:
Simba: 4.44/5.00
Coolflex: 4.18/5.00

Price:
Simba: £129.99 - £1189.30
Coolflex: £149.00 - £399.00


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


Becky
Compares

Simba Owner Satisfaction

Satisfaction for Simba is high on their priority list, offering an impressive comfort guarantee which means that if you are not 100% satisfied with your purchase you are able to organise a return for a full refund. The return process is one of the easiest we have come across and involves letting the company know and they will arrange collection at a time convenient to you. Additionally, there are no additional surcharges, costs or delivery fees associated with the returns process which means you get 200 nights risk free to try the mattress.

After this trial period you will also receive a market leading 10 year guarantee that will further instill confidence and ensure your investment is protected long term.

Simba Supportiveness

Simba have multiple mattresses in their range, however all offer roughly the same level of supportiveness coming in at a medium firm tension. The comfort that you derive from a mattress will generally come from the top layer that sits somewhat detached from the support layer. The support layer is what contours and fights against your body to give you pressure relief. Depending on how you sleep or how much you weigh are both factors in determining suitability of tension. With the medium firm support of the Simba lineup we find them most suitable for back sleepers and those of average or heavier build. That said, due to the inclusivity that Simba has aimed to achieve through its prototypes and extensive testing, we do have plenty of reports of side sleepers and those who are lighter getting maximum comfort out of the lineup.

Simba Durability

People are increasingly expecting more from their mattresses with more comfort and more support on offer than ever before. It’s actually a really great time to buy a new mattress as companies new and old are changing the way they do business and produce mattresses with improvements and savings along the way. The same has become true for durability and while the average lifespan of a mattress before being replaced currently lies at around 7 years, the Simba goes above and beyond with a guarantee covering a full 10 years. The result of mattresses lasting longer is the cost of sleep actually decreases relative to cost and time meaning products like Simba may be cheaper in the long run due to that enhanced and increased durability.

Simba Best Offers

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

Simba Most Useful Customer Reviews

5 Anna B.

We've been needing a new mattress for a long time, to replace our turn of the century Sealy memory foam mattress and divan bed, which we have had lots of use from (2nd hand from family when we got it). We wanted to invest in a really high quality, low environmental impact mattress (and bed) that also ticked all the boxes for comfort, support, no nasty off-gassing chemicals, made with natural materials and market leading durability. This was a huge outlay for us and we've been thinking about it for a few years. We're now in our mid 50's and know that a good night's sleep is crucial, particularly as I'm a light sleeper and have suffered from back and hip pain in the past. Our old mattress was smelly, well past its prime and I dread to think what might have been living in it (and on us!). So, we see this new Simba mattress as an investment for our future. Lots of really helpful info on the website and very enticing video of the mattress we were considering. Once we decided to go for it, we had a bit of trouble paying for the order on the website as I couldn't figure out how to set up the credit facility to spread the cost. In the end I had to message Simba about it and soon after was given the option of having a callback slot, at a time to suit me, to speak to a person. The customer service chap rang me at the allotted time and was very helpful and polite, who helped us resolve the issue, with the added bonus of a further code to use to get free collection of our old bed and mattress, which saved us 50, that really made us happy. We are very pleased with the promotional offer of free high quality Simba bedding as well (2 pillows, duvet and mattress cover), so felt that although it was a big expense, we were buying the best we could afford and were being treated very well as customers. Following the email confirmation of the order after purchase, a day or two later we received details of the VIP service delivery and the date suggested worked for us. So, within a week of placing the order we would get our new bed and mattress (we live in rural Wales, not that easy to get to). Two gentlemen from the delivery company arrived on time, carefully backed up their van on our narrow driveway, carried in the bed and mattress with care, they were really polite and quietly got on with the job of building the new bed. They would have removed the packaging too, but I asked if we could keep it, no problem at all! They removed our old bed and mattress and so within the hour of their arrival we were all set up with our new bed and mattress. Fab! The mattress is very different to our old memory foam one. It's much deeper, heavier and firmer. I'm a side sleeper, but occasionally sleep on my back. It did take me a few days to get used to the new firmer support, but it does have lovely soft cushioning in the top layer. After a few weeks we are now feeling much more comfortable on it than we did initially. I can feel it does give me much better support, as am not getting back pain from sleeping on it. My husband really loves it. According to our Fitbit watches, which we wear at night, we are generally getting a good quality night's sleep (we just need to get to bed earlier now to make the most of it!). For me, with a very sensitive sense of smell, there is also a slight scent of sheep wool, which was stronger to start with. I actually like this smell, and it reminded me what the mattress contains, natural fibres, not off-gassing of chemical VOCs. But, we do make sure we air the bed each day, which is good sleep hygiene, whatever mattress you're on. The mattress comes with helpful information about how to care for it. It definitely will need two of us to turn it every so often, way too heavy for me on my own. I do find changing the bedclothes harder work, as the mattress is heavy to lift to get the fitted sheet on it, especially at the head end. So bear this in mind if you live on your own and you order King Size! You also need to use extra deep fitted sheets. We hope that it'll remain this comfortable for the next 10 years, reassured by the guarantee and love the fact that the mattress was made only a couple of weeks before we bought it (the label on it states when it was made). Nice to think it's not been sitting very long in a warehouse somewhere before we received it. Lovely to know that its recyclable at end of life too and we're supporting a certified B Corp. Fingers crossed we'll both be still sweetly sleeping on it well into our 60's.

4 Martin D.

So, two weeks ago, I got a response from the supplier of my previous mattress (Emma) saying that due to some sort of restructure, they wouldn't be able to deliver a new mattress for weeks. They gave me the option to get a refund, which I took. I needed the mattress by that Sunday at the latest as that's when my temporary accommodation in the Airbnb that I was staying at came to an end and I needed to sleep at my new less-temporary, but unfurnished accommodation. My previous mattress had been damaged by the water ingress at Coniston House (google it for stories in the Standard and The Slice, Tower Hamlets if you're interested). The ongoing works on my building necessitated the move. Anyway, I found a roughly equivalent mattress sold by Simba, which is UK-based and B Corp certified. It is a bit more expensive, but hey, it was an emergency and they offered to deliver the next day if ordered before 1 p. m. This is when it all went horribly wrong. Simba sent the mattress by DPD and DPD's tracking showed it was out for delivery. The delivery slot came and went and then the tracking said they were running late. Phoning DPD to find out what was going on, they reassured me that they would deliver it that day, but it appeared from the tracking that it had gone back to the depot. I waited in until 8 p. m. The same thing happened on Friday, the contact centre reassured me that it would be delivered, but tracking I could see showed that it was still at the depot. I eventually got a call back from the depot who said it wasn't out for delivery after all and wouldn't be delivered that day (despite what the call centre had said). DPD booked it in for a Saturday delivery. Saturday came, again, the same pattern and no delivery. The DPD contact centre doesn't seem to have any way to contact people on the ground, and I won't call it lying, but they make statements (e. g. that they will certainly deliver today) which they clearly don't have the information to back up. On the Monday, I had an exchange with Simba, who arranged for the delivery with DPD to be cancelled. I had to go to the office on Tuesday (I had already spent several days trapped working from home by DPD), so Simba arranged to send out a replacement with ao. com's logistics on Wednesday. On Wednesday, Garry from AO called me first thing to say he was delivering that morning, and he called again when he was on the way from his previous job. Delivered direct to my door, no fuss. It seems from other reviews of DPD that mattress delivery and other heavy/bulky items are a recurring problem for DPD. I would give Simba five stars, especially for fixing the mess as promptly as they could. However, it was their choice in the first place to use DPD where there appear to be known issues with their performance. If Simba turn to using AO for all their deliveries, I would give them an unqualified recommendation as the mattress is super comfortable and their customer service is helpful and responsive. Most importantly, over the last week, I've had the best night's sleep I've had in over a year!

5 Sushmita S.

A Dream Come True: My Love Affair with the Simba Hybrid Pro Mattress From the moment it arrived, compactly boxed and ready to unfurl its magic, the Simba Hybrid Pro mattress promised something special. And after countless nights of blissful, restorative sleep, I can confidently say it has delivered on every single promise - and then some. This isn't just a mattress; it's an investment in unparalleled comfort, ingenious design, and truly transformative sleep. The first thing you notice is the immediate sense of luxurious comfort. Simba rates it as a medium-firm, and I'd say that's spot on. It's not a sink-in-and-get-stuck kind of soft, nor is it a rock-hard surface. Instead, it strikes that elusive perfect balance: a plush, comforting top layer that cradles your body, seamlessly supported by a robust, responsive core. The magic truly lies in its unique layering system. The natural wool layer is a game-changer, providing a breathable, sumptuously soft feel that keeps you cool in summer and cosy in winter - a genius touch for anyone who struggles with temperature regulation. Beneath this, the innovative Simbatex foam, infused with cooling graphite, works tirelessly to dissipate heat, ensuring you never wake up feeling clammy. But the real unsung heroes are the dual layers of Aerocoil micro springs. These tiny, conical titanium alloy springs are individually responsive, providing tailored support that adapts to your body's every curve and movement. As a restless sleeper, I've noticed a significant reduction in tossing and turning, and my partner's movements are practically imperceptible thanks to the excellent motion isolation. Beyond the incredible comfort, the Simba Hybrid Pro boasts exceptional build quality. The firm borders, thanks to Simba's Edge Lift Technology, mean you can utilize every inch of the mattress without feeling like you're about to roll off - a fantastic benefit for couples or those who spread out. It's clear that every detail, from the breathable cover to the ergonomic support zones in the base foam, has been meticulously designed to promote optimal spinal alignment and pressure relief. I've personally experienced a noticeable improvement in any morning aches and stiffness since switching to the Hybrid Pro. And let's not forget the practicalities. The mattress arrives conveniently rolled and boxed, making it surprisingly easy to manoeuvre, even for a king-size. The removable, washable cover is a hygiene godsend, keeping your sleep environment fresh and clean. While it sits at a premium price point, the Simba Hybrid Pro is an investment that truly pays dividends in quality of life. It's no wonder it's garnered so many accolades and glowing reviews from independent experts and sleepers alike, including a Which? Best Buy award. For anyone seeking a mattress that offers the ultimate blend of cloud-like comfort, unwavering support, and intelligent temperature regulation, the Simba Hybrid Pro is, quite simply, a dream come true. Prepare to experience sleep redefined.

5 Mike F.

I've had my new bed frame, mattress, pillows, duvet, sheets and covers for over 3 weeks now. In this time I have had to say this is the best 3 weeks sleep I have ever had!! I have a lot of problems sleeping normally due to my mental health, anxiety and my rheumatoid arthritis. Sleeping was one aspect in my life that I always dreaded at the end of a long and tiring day, because i always really struggled with sleeping. Despite all of my efforts to improve my sleep I.E, going to sleep at a suitable time, eating and drinking healthy, not using electronics that are bright before sleep, avoiding caffeine.. you name it. I have tried almost everything and nothing seemed to improve despite all of my efforts. It got so bad that I had to be prescribed medication so I could sleep. However, since I have had the pleasure of sleeping in my new simba bed, everything has changed for the better and i no longer need anything to aid me to sleep. What I mean by this, is my health. My health has already had a huge improvement! My anxiety feels better, my depression feels easier to manage and most importantly my arthritis has had signs of improvement! I now feel less stressed, I overthink less, I don't get as anxious and I don't feel as fatigued or in pain as much with my arthritis because my sleep is so much better. My mind and body is finally able to have the time it needs to heal and recover because I am able to sleep so well now. Before simba, I would have problems with sweating, back pain, disrupted sleep and much more including physical pain and always feeling fatigued. But this is a thing of the past now, because the mattress and duvet from simba is absolutely amazing and so well made! It's incredibly comfortable, better than any bed I have slept on and this includes any hotels I have stayed in. I now fall asleep in minutes, where as before it could be hours. The "Stratos Technology" that simba uses to keep your body temperature cool and regulated while you sleep is a game changer and it couldn't be any better! The bed frame itself is an "Ottoman" bed which is also very well made. The space it has under the bed is fantastic! Even with my arthritis, I am still able to lift up the bed for it's storage use without any pain, discomfort. The gas hydraulics make lifting the bed (even with my ultra mattress) effortless. I don't normally leave reviews, but for simba I really want to because they truly deserve it! Struggling with my health conditions isn't easy from day to day. But simba has made such a big impact to improving my sleep, that it's had an positive effect on the rest of my life and I feel much better in myself. I wanted to share my experience with simba so far because I'm astonished with how much better my sleep and health has improved since I have had my simba bed. I no longer dread sleeping anymore, my mental and physical health is improving by the day! So, thank you simba for my flawless bed, mattress, duvet, pillows and covers! You have given me my life back .

5 Sushmita S.

My Love Affair with the Simba Hybrid Pro Mattress From the moment it arrived, compactly boxed and ready to unfurl its magic, the Simba Hybrid Pro mattress promised something special. And after countless nights of blissful, restorative sleep, I can confidently say it has delivered on every single promise - and then some. This isn't just a mattress; it's an investment in unparalleled comfort, ingenious design, and truly transformative sleep. The first thing you notice is the immediate sense of luxurious comfort. Simba rates it as a medium-firm, and I'd say that's spot on. It's not a sink-in-and-get-stuck kind of soft, nor is it a rock-hard surface. Instead, it strikes that elusive perfect balance: a plush, comforting top layer that cradles your body, seamlessly supported by a robust, responsive core. The magic truly lies in its unique layering system. The natural wool layer is a game-changer, providing a breathable, sumptuously soft feel that keeps you cool in summer and cosy in winter - a genius touch for anyone who struggles with temperature regulation. Beneath this, the innovative Simbatex foam, infused with cooling graphite, works tirelessly to dissipate heat, ensuring you never wake up feeling clammy. But the real unsung heroes are the dual layers of Aerocoil micro springs. These tiny, conical titanium alloy springs are individually responsive, providing tailored support that adapts to your body's every curve and movement. As a restless sleeper, I've noticed a significant reduction in tossing and turning, and my partner's movements are practically imperceptible thanks to the excellent motion isolation. Beyond the incredible comfort, the Simba Hybrid Pro boasts exceptional build quality. The firm borders, thanks to Simba's Edge Lift Technology, mean you can utilize every inch of the mattress without feeling like you're about to roll off - a fantastic benefit for couples or those who spread out. It's clear that every detail, from the breathable cover to the ergonomic support zones in the base foam, has been meticulously designed to promote optimal spinal alignment and pressure relief. I've personally experienced a noticeable improvement in any morning aches and stiffness since switching to the Hybrid Pro. And let's not forget the practicalities. The mattress arrives conveniently rolled and boxed, making it surprisingly easy to manoeuvre, even for a king-size. The removable, washable cover is a hygiene godsend, keeping your sleep environment fresh and clean. While it sits at a premium price point, the Simba Hybrid Pro is an investment that truly pays dividends in quality of life. It's no wonder it's garnered so many accolades and glowing reviews from independent experts and sleepers alike, including a Which? Best Buy award. For anyone seeking a mattress that offers the ultimate blend of cloud-like comfort, unwavering support, and intelligent temperature regulation, the Simba Hybrid Pro is, quite simply, a dream come true. Prepare to experience sleep redefined.

Coolflex Most Useful Customer Reviews

4 Samantha Lane

Very glad I didn't spend 900 on a mattress (as I was going to!), As this one is absolutely perfect and didn't break the bank (hurray!) Its soft on top, but firm and supportive... My partner and I do not roll into each other in the night as pre my previous mattress. We both sleep really soundly on this mattress which suprises me as he actually prefers really really firm memory firm mattresses that feel like concrete!! Doesnt give me back pains like my previous mattress, wake up refreshed. Something I was worried about for the low price tag! The edges are not reinforced so do sag if you sit on the edge of the bed - but its fine when you are asleep//roll onto the edge - ie, you dont end up falling off as with some mattress that are not reinforced!. It does get a bit hot with the memory foam, but after putting a bottom sheet on, it isnt as bad as it was on the first couple of nights.

4 Jillian Knight

Very good quality mattress! great support throughout and good degree of comfort. Mattress came rolled up so needed approx 24 hours to properly settle and for all the creases to disappear before I could use this. This time for the mattress to fully open was stated in the delivery note so I was not concerned about the wait. The only issue I noticed was the mattress is fairly heavy to move due to the number of springs inside, and there are no carrying handles on the sides that would have helped to assist with moving and positioning the mattress. Otherwise I am very happy with this product.

5 Eileen Smith

When I ordered 'next day delivery', I was sceptical. I need not have been. I received an email advising a next day delivery slot of 9.40 - 11.40 and the mattress was delivered at 11.15. The delivery guys were lovely carried it up to the bedroom. It was a great service. I only wish you did next day delivery black 5 drawer chest of drawers, as I have been badly let down by littlewoods and they had up to 15 days to deliver. Let me down badly and so I cancelled. I would recommend your company to friends and family. Thank you.

4 Nik Pringle

You need to ensure you have the mattress the right way up - indifferent nights sleep until I spotted it was upside down! getting used to it after a couple of nights, the edges of the bed are not as firm as our previous sprung one making it slightly uncomfortable to sit on the edge. There is also a tendency to roll together into the middle - hence 4 * as opposed to the full 5. I tend to find memory foam mattresses sleep "hotter" than normal ones - fine at the moment but may be a bit warm if we get a good summer.

5 Dawn

I was actually surprised with the quality and comfort of this mattress considering its very reasonable price. It was delivered rolled in several layers of polythene, which was necessary to contain it. It is a lovely deep mattress and so comfortable. I would recommend it to anyone, and am positive it has to be as good as any mattress considerably more expensive. Id been prone to back and hip aching problems on a mattress that wasnt right, this mattress solved that after first night.

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