- Cooling Simbatex foam, high-density foam base
- 6.5 cm (2.5 inches)
- Available in standard UK sizes
Tell me more about the Simba Cool Foam mattress topper
The Simba Cool Foam mattress topper features three layers, including a soft knitted cover, cooling Simbatex foam, and a high-density foam support base.
The foam is CertiPUR-certified and guaranteed to be free from TCPP, phosphates, parabens, biocides, and persistent organic pollutants.
Because it's built entirely from foam rather than springs, the Cool Foam topper gives a softer, more body-hugging feel than Simba's hybrid toppers.
The Simbatex foam is infused with graphite and offers over 5 times more airflow than memory foam, helping keep you cool throughout the night.
The foam base also has a contoured, egg-crate-style texture that creates small air pockets, further enhancing airflow and breathability.
The Cool Foam topper features an anti-slip base and elasticated straps to keep it firmly in place on your mattress.
Reasons to buy
Softer, more body-hugging feel |
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Excellent airflow and cooling |
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Simba's most affordable topper |
Reasons to avoid
Less supportive than hybrid options with springs |
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Not as firm as the Essential or Hybrid toppers |
- Simbatex foam, Aerocoil microsprings, foam support base
- 7 cm (2.75 inches)
- Available in standard UK sizes
Tell me more about the Simba Hybrid Essential mattress topper
The Simba Hybrid Essential mattress topper features four layers, including a soft, breathable cover, Simbatex foam, a layer of up to 1,500 Aerocoil microsprings, and a foam support base.
Both foams are CertiPUR-certified and guaranteed to be free from TCPP, phosphates, parabens, biocides, and persistent organic pollutants.
Because of its hybrid composition, the Essential topper feels firmer and more supportive than Simba's all-foam Cool Foam topper.
The Aerocoil microsprings are conical and compress inwards as you move, pushing air upward and offering responsive, targeted support, but they're small enough that you won't feel them individually.
The Simbatex foam layer adds cushioning on top and enhances airflow, offering over 5 times more airflow than memory foam for a cooler feel.
The Essential topper also features an anti-slip base and elasticated straps to keep it firmly in place, plus a removable, machine-washable cover.
Reasons to buy
Supportive Aerocoil microsprings, unique to Simba |
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Firmer, springier feel than all-foam toppers |
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Cheaper than the flagship Simba Hybrid topper |
Reasons to avoid
Fewer microsprings than the flagship Simba Hybrid topper (1,500 vs 1,900) |
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Not as cooling as the flagship Simba Hybrid topper |
- Simbatex foam, mini pocket springs, high-density base foam
- 6.5 cm (2.5 inches)
- Available in standard UK sizes
Tell me more about the Simba Hybrid mattress topper
The Simba Hybrid mattress topper features three advanced layers, including Simbatex foam, mini pocket springs, and a high-density base foam.
Both foams are CertiPUR-certified [1] and guaranteed to be free from TCPP, phosphates, parabens, biocides, and persistent organic pollutants.
Because of its hybrid composition, the Simba topper feels much firmer than pure foam toppers.
It can also be classified as a cooling mattress topper as the springs allow for maxium airflow.
Additionally, the cover with 3D mesh fabric is ultra-breathable, further enhancing airflow and helping with temperature regulation.
The Simba topper features an anti-slip base and elasticated straps to keep it firmly in place on your mattress.
Reasons to buy
Firmer, more cooling feel |
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CertiPUR-US certified |
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Risk-free 200-night trial |
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10-year guarantee |
Reasons to avoid
Not as body-hugging as memory foam toppers |
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Quite expensive |
Simba mattress topper comparison
Simba's three toppers sit at three clear price points, and the difference isn't just cost, it's construction.
The Cool Foam is pure foam, while the Essential and Hybrid both add a layer of Aerocoil microsprings, with the Hybrid getting more of them.
| Cool Foam | Hybrid Essential | Hybrid | |
| Price from | £ | ££ | £££ |
| Composition | Foam only (3 layers) | Foam + up to 1,500 microsprings (4 layers) | Foam + up to 1,900 microsprings (4 layers) |
| Depth | 6.5 cm | 7 cm | 7 cm |
| Feel | Softer, body-hugging | Medium-firm, some bounce | Firmest, most bounce |
| Best for | Budget buyers wanting a cooling boost | Support-seekers who don't need the top tier | Restless sleepers wanting max support & cooling |
In short:
- Want the cheapest way to add some comfort and cooling? → Cool Foam
- Want spring-based support without paying the fllagship price? → Hybrid Essential
- Want the most supportive, coolest, bounciest option? → Hybrid
Whichever you choose, all three come with Simba's standard 200-night trial and 10-year guarantee, so the safest way to decide is to try one and see how it feels on your own mattress.
Who is the Simba Hybrid topper best suited to?
The Simba mattress topper is an excellent product that's well suited to:
- People looking for a slightly firmer topper.
- Those after a cooling mattress topper.
- People with a higher budget.
- Restless sleepers looking for a little more bounce.
- Those looking for one of the best-quality toppers on the market.
If you're looking for a soft and squishy topper, this is not the one for you, but it will be one of your best choices if you're after something firmer and more cooling. ⭐️
Check out our full rating below before diving into our in-depth Simba Hybrid mattress topper review:
What does sleeping on the Simba Hybrid topper feel like?
Mattress toppers are designed as comfort layers to change how your mattress feels.
In general, they're meant to add a layer of softness and comfort to firmer mattresses, but our experience with the Simba topper was quite unique.
How firm is the Simba Hybrid topper?
It isn't easy to give a set degree of firmness to mattress toppers in the way you'd give a mattress a firmness level.
This is because the firmness of the topper is directly influenced by the firmness of the mattress underneath.
However, most toppers are designed to be medium firm, making your sleeping surface a little softer and giving your mattress an instant comfort boost.
That said, we were pleasantly surprised to find that the Simba topper gave our soft memory foam mattress a bit more stability.
Memory foam is characteristically softer and allows your body to sink in a little more deeply, but the hybrid composition of the Simba topper made it a little firmer and easier to move around on. 🥳
We wouldn't recommend relying on a mattress topper to make a mattress firmer, but it does help if you're stuck with a memory foam mattress and not a big fan of the way it feels.
The Simba Hybrid mattress topper really feels very different to standard memory foam mattress toppers.
Of course, if your mattress isn't memory foam, you'll still reap the benefits - the Simba topper will still be soft enough to make a firmer mattress feel a little more comfortable.
How comfortable is the Simba Hybrid topper?
We found the Simba topper incredibly comfortable to sleep on.
It's quite unique in that it combines Simbatex foam and pocket springs.
- The foam provides body-contouring support and pressure relief that's comfortable without being too constrictive, as memory foam often is.
- The springs provide better support and a gentle bounce-back so you can move easily on the topper, and they adapt well to your body for tension relief.
The Simba topper is particularly well-suited to side sleepers using a slightly firmer mattress. 👌
If your mattress is too firm, pressure points will build up in the hip and shoulder areas, causing back pains and aches.
But adding a topper to the mix will allow for a little extra sinkage, ensuring spinal alignment and keeping you pain- and ache-free.
Can the Simba Hybrid topper add a little bounce?
The Simba Hybrid topper will give you a good amount of bounce.
We like thinking of it in this way:
- Memory foam is like a dead spot. You'll lie flat and still, and you won't feel any motion carried through.
- The Simba topper is more "alive". You'll still lie flat and comfortably, but there is a little more movement across the surface as a whole.
If you're a restless sleeper, you'd want to look for a surface feel like the Simba topper. 💃
It makes moving on your mattress easier so you never feel "stuck" in the foams, but motion transfer still stays low.
During our Simba Hybrid topper review, we felt more bounce and movement than with memory-foam-only products like the Panda topper, but we never felt excessive motion transfer.
This makes it a great option if you're sharing your bed with a partner. 👩❤️👨
Does the Simba Hybrid topper sleep hot?
The Simba topper has been designed as a cooling mattress topper with numerous temperature regulation properties:
- The topper cover is breathable, allowing for a steady flow of air.
- The side of the cover has a 3D mesh for extra airflow.
- Simbatex foam has an open-cell structure and larger pores for enhanced breathability.
- The spaces between the springs allow for natural ventilation channels, further enhancing airflow.
These features promote breathability throughout the topper, wicking away heat and moisture and keeping you cooler and more comfortable all night long.
To test this, we contrasted the Simba topper to the Panda memory foam topper (memory foam is known to retain more heat).
Even though the Panda topper has cooling features, it still felt significantly warmer than the Simba topper.
If you're a heavier sweater or sleep hot, going for a hybrid topper like the Simba is an excellent idea.
Overall, the Simba topper is one of the most comfortable mattress toppers we've ever slept on, and it'll be well-suited to those looking for a cooler and slightly firmer sensation, as well as some added bounce.
Simba Hybrid mattress topper composition
The Simba Hybrid topper aims to replicate the feel of the Simba mattress in a smaller package.
There are four layers to the Simba Hybrid topper:
1. Simba mattress topper cover
The Simba mattress topper cover consists of two distinct parts:
- The top part is 100% polyester, a soft and breathable surface material to enhance the topper's cooling features.
- The bottom half is an anti-slip base layer with an almost plasticky feel. This helps keep your topper firmly on the mattress.
Conveniently, the top part of the cover is removable and machine-washable at 40℃.
It's pretty easy to take off, but putting it back on again is a bit of a challenge.
During our Simba topper review, we struggled to align the grey mesh side with the sides of the topper - the mesh always seemed to sit slightly further up or down. 😡
This isn't a train smash, but it may be easier to put the cover back on again with two people.
The Simba topper also has elasticated corner straps, which fit snugly around your mattress and ensure it stays in place.
In our experience, choosing a topper without straps is a no-go.
We did find, though, that the Simba topper straps are quite tight.
This is great as it ensures your topper sits perfectly, but it could be challenging if you have a very deep mattress. 📏
If you look at the picture below, you can see that the strap stretches quite tightly around an 18 cm (7 inches) mattress.
If you have a very deep mattress - 30 cm (11.8 inches) or deeper - this may be a bit of an issue. 🧐
Adjustable straps, as you find with the Panda mattress topper, may be a bit more practical for deep mattresses.
2. Simbatex foam comfort layer
This cooling open-cell foam layer provides comfort, support, and enhanced airflow.
It's CertiPUR-US [2] certified to be free from heavy metals like mercury and lead.
The Simbatex foam is also infused with natural graphite, which is known to dissipate heat for a cooler sleep.
The hybrid composition of the Simba mattress topper is truly unique.
While most mattress toppers are pure foam toppers, the Simba topper combines both foam and conical pocket springs. 🌀
What are the available Simba topper sizes?
All three Simba toppers - Cool Foam, Hybrid Essential, and Hybrid - are available in the same standard UK mattress sizes. 🇬🇧
- Simba mattress topper single: 90 x 190 cm (3' x 6'3")
- Simba mattress topper small double: 120 x 190 cm (4' x 6'3")
- Simba mattress topper double: 135 x 190 cm (4'4" x 6'3")
- Simba mattress topper king-size: 150 x 200 cm (5' x 6'6")
- Simba mattress topper super king-size: 180 x 200 cm (6' x 6'6")
The wide range of sizes is convenient as it ensures you can get the topper for any size bed!
What does the Simba Hybrid mattress topper weigh?
The Simba mattress topper can be quite bulky, depending on the size you go for, but it won't weigh more than 20 kg (44 lbs).
- Simba mattress topper single: 11.1 kg (24.5 lbs)
- Simba mattress topper small double: 13.4 kg (29.5 kg)
- Simba mattress topper double: 14.5 kg (32 lbs)
- Simba mattress topper king-size: 16.5 kg (36.4)
- Simba mattress topper super king-size: 19.1 kg (42.1 lbs)
Luckily, mattress toppers won't have to be moved often as your mattress protector and bedding will stretch above the topper itself.
What is the Simba Hybrid mattress topper depth?
The Simba Hybrid topper has a depth of 7 cm (2.7 inches).
This is a good depth for toppers, above the industry standard of 5 cm (1.9 inches). 🥳
It also ensures that the topper really does change the way your mattress feels!
One issue you may encounter with deeper toppers like the Simba is that you need fitted sheets that'll go over the depth of the topper and your mattress.
Luckily, Simba offers a fantastic range of bedding specifically designed to stretch over higher mattresses or mattress and topper combos.
Simba mattress topper prices and discounts
The Simba mattress topper is an excellent product, but it's much more expensive than other mattress toppers on the market.
- Silentnight mattress toppers and IKEA mattress toppers, for example, are available at a mere fraction of the price.
- But even comparable quality products, like the Panda mattress topper and the Emma Original topper, are much cheaper.
The premium price is primarily due to the hybrid nature of the topper as pocket-sprung products are generally more expensive than all-foam products.
Luckily, though, Simba has also introduced a few cheaper topper options, so if you like the sound of Simba's technology but want to spend less, the Cool Foam or Hybrid Essential toppers are worth considering (see our comparison above).
The Simba Hybrid Essential topper in particular is almost identical to the Hybrid topper, but available at a cheaper cost.
You'll also occasionally find Simba mattress topper discounts, including percentage-off vouchers - if there are any Simba mattress topper discounts currently running, we'll display them throughout this article.
Simba topper delivery and trial conditions
All three Simba toppers are delivered rolled up and boxed. 📦
Conveniently, Simba offers free next-day delivery on all toppers if you order before 1pm.
Simba mattress toppers are much smaller and lighter than the actual mattress, but the box is still quite large, so you may need a bit of help carrying it if you're of a more petite build. 💪
We needed some help for our Simba topper review.
How do you unpack your Simba mattress topper?
The Simba mattress topper is compressed but unboxing is very simple:
- Open the box on top of your mattress and roll out your mattress topper.
- Cut off the plastic wrapping.
- Roll out the topper across your bed.
- Leave it to expand for at least 2 hours.
Your topper should be fully expanded in a maximum of 24 hours. ⏰
What's that smell?
Many bed-in-a-box mattresses and sleep products emit a chemical smell when you first unpack them. 🧪
This is called off-gassing, and while it's completely normal and non-toxic, the smell can be really unpleasant.
Unfortunately, we experienced severe off-gassing when we first unpacked the topper for our Simba mattress topper review. 😱
It took 3 or 4 days for the smell to disappear completely, but we didn't have any problems after that.
We'd always recommend that you unpack your new bed products in a well-ventilated room and let them air until the smell disappears.
Do Simba mattress toppers come with a trial period?
Conveniently, every Simba mattress topper comes with a risk-free 200-night trial period.
200 nights is great, as it'll give you plenty of time to test the topper and see if it works for you.
If you're not sleeping more comfortably than ever before, you can simply send the topper back and get a full refund.
Every Simba mattress topper also comes with a 10-year guarantee.
Is the Simba Hybrid mattress topper worth the money?
There's no denying that the Simba Hybrid topper is an excellent mattress topper, despite its significantly higher price tag.
If you have the budget available, this is an excellent buy.
We'd also highly recommend it to anyone looking for a cooler and firmer mattress topper.
And if you're looking for Simba technology at a slightly lower price point, the Simba Cool Foam and Simba Hybrid Essential mattress toppers are also worth checking out.
Contact Simba Sleep UK
Customer service: To contact Simba Sleep directly for complaints, support, or queries, please e-mail them at hello@simbasleep.com or visit their live online chat. The customer services team is available Monday to Friday, from 9 am - 5 pm, and Saturdays from 9 am to 1 pm.
Registered office: Simba Sleep Limited, 5th Floor Halo Counterslip, Bristol, BS1 6AJ
Table of Contents
Simba mattress topper comparison
Who is the Simba Hybrid topper best suited to?
What does sleeping on the Simba Hybrid topper feel like?
Simba Hybrid mattress topper composition
What are the available Simba topper sizes?
Simba mattress topper prices and discounts
Simba topper delivery and trial conditions










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