I tested the Simba Hybrid Topper – I think it's the next best thing to a new mattress

Our Simba Hybrid Topper review discovers this premium mattress topper offers cushioning, support, and the breathability you need for a cooler night's sleep

The Simba Hybrid mattress topper on a grey upholsterd bed in white bedroom
(Image credit: Future)
Ideal Home Verdict

The Simba Hybrid Topper combines springs and memory foam to create what's essentially a thinner version of the brand's bestselling mattress. It offers cushioning, support and innovative materials that make for a cooler and more breathable sleep.

Reasons to buy
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    Supportive and cushioning

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    Breathable for a cooler sleep

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    Good motion isolation

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    Anti-slip base and straps

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    Removable machine-washable cover

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    Rolls up for easy storage

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    200-night sleep trial

Reasons to avoid
  • -

    An investment

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This Simba Hybrid Topper review puts the brand's bestselling mattress topper to the test to see how it compares to the best mattress toppers and best cooling mattress toppers on the market.

The Simba Hybrid Topper is fairly unique in that rather than just offering cushioning like most mattress toppers do, it's also designed to deliver support thanks to its combination of pocketed micro springs underneath a memory foam top layer.

Simba's Simbatex® memory foam is also more breathable than most thanks to an 'open cell' design that offers better air circulation than denser memory foams. That, combined with the graphite infused into the memory foam top layer to draw heat away from the sleeper, and the addition of springs which also improve air flow, should mean this topper is also breathable. And that means a cooler, more restful night's sleep.

It's not a budget buy, but potentially this topper could save you money by extending the life of your current mattress or even removing the need to buy a new mattress at all. And, as the best mattresses on the market certainly don't come cheap, that could make it worth the investment.

As such, I was eager to test out this topper in my own home to see whether it could live up to its claims. During testing, I noted how easy it was to attach to my bed, how comfortable myself and my partner found it to sleep on, whether it was able to keep me feeling cool overnight, and how easy it is to care for.

Simba Hybrid Topper review


  • Construction: Hybrid memory foam and springs
  • Sizes available: Single / Small Double / Double / King / Super King
  • Depth: 6.5cm
  • Care instructions: Machine-washable removable cover

A picture of the SImba Hybrid mattress topperproduct badge

(Image credit: Simba)

How I tested

Rachael Phillips freelance writer
Rachael Phillips

I’m Rachael, a freelance reviewer who helps the Ideal Home team put products through their paces to find the top recommendations for our readers. For this review, I tested out the Simba Hybrid Topper over my existing mattress on a king size slatted bed base.

I'm a combination sleeper, so this mattress topper's comfort levels have been put through their paces in various different sleep positions, and – much to my partner's annoyance – I tend to move around a lot at night, so I was able to test out the Hybrid Topper's motion isolation as well. As a hot sleeper I was also well placed to assess the topper's breathability to see if it delivered a cool night's sleep.

Sleep position: combination sleeper, but mainly side Tension preference: medium firm Sleep problems: hot sleeper, lower back and neck pain

What the brand says

Simba claims that the Simba Hybrid Topper can 'transform any mattress in any instant', which it does by way of its four-layer construction.

The first layer is the removable and machine-washable cover. Then there's the Simbatex® memory foam which is an ‘open cell’ construction that's less dense and designed to allow better airflow than standard memory foam. The Simbatex® memory foam is also infused with graphite, a mineral hugely popular in the sleep world at the moment due to its ability to conduct heat away from the sleeper.

Underneath this is the Aerocoil® spring support layer which features up to 2500 pocketed micro springs. Then, there's the high-density Certipur® foam base and an anti-slip base cover fitted with four corner straps for attaching the topper to a sleep surface.

Simba states that the topper is made from 100% recyclable materials and where possible they use carbon-neutral shipping. There's also a generous 200-night sleep trial available to test out whether this topper is for you, before you commit.


The Simba Hybrid Topper arrived rolled up in a branded Simba box, pretty much the same size as one of the brand's full size mattress-in-a-box deliveries. I was initially really shocked at how big and heavy this box was, however, thankfully once the mattress topper is out of box, it’s a lot lighter and easy to move around.

Once I'd removed the plastic wrapping and had the mattress topper on the bed it quickly expanded to its full 6.5cm height. There was no off-gassing smell which I was half expecting since it was vacuum packed.

The Simba Hybrid Topper in a branded box in a room with grey carpet

(Image credit: Future)

Attaching the topper to the bed

Unlike some mattress toppers I've tested, there is no way the Simba Hybrid Topper is going to slide off your bed.

Not only have Simba added four wide elasticated straps to each corner of the topper so that you can slip them over your mattress or sofa bed to hold the topper in place, but the base is also made from an anti-slip material which keeps it firmly secured.

The straps aren’t adjustable, but they’re big enough to wrap around a mattress up to 30cm deep. And even though the slip-proof base does a good job of stopping the topper from moving around at night, it's still easy enough to position on the bed to begin with so that it fits perfectly across your mattress.

One other bonus of these straps – and this mattress topper in general – is the fact that the topper has been designed so that you can roll it up for easier storage when you don’t need it. This means it’s ideal for use on sofa beds or even if you’re travelling. When you want to store the topper, simply roll it up and use the straps to keep it secured.

A close up of the Simba Hybrid Mattress topper showing its elastic corner straps

(Image credit: Future)


The mattress I sleep on is the Simba Hybrid Pro mattress, so I've already discovered I'm a big fan of Simba sleep surfaces, and I had high expectations of this topper. Luckily, I wasn't disappointed.

At 6.5cm in depth, this is a pretty thick topper, and I found it did a great job of masking a hard sleep surface underneath.

The topper has a medium-firm rating, so most sleepers should find it comfortable, although I found it felt a little more on the firm side for the first two to three nights I slept on it. But once I’d acclimatised to it, I found it soon felt a little softer and a lot more comfortable.

I mainly sleep on my side and found the memory foam upper layer and spring support did a really good job at providing extra support for my back, neck and shoulders in this position. I also move around a lot and found this topper to be super responsive, snapping back in to shape instantly.

Because I share a bed with my partner I was initally a little worried that the springs might make the topper feel a little bouncy any time either of us moved, but it did a really good job of isolating movement. I didn’t notice when my husband got up to use the toilet or when the dog jumped on the bed, so if you have a fidgety partner, you might be able to say goodbye to restless nights.

A close up of the Simba Hybrid topper on a grey upholstered bed

(Image credit: Future)


I tend to sleep super hot. Even in the middle of winter I’ll wake up to find I’m outside of the blankets with one leg hanging out of the bed to cool me down.

This topper did an excellent job of keeping me cool during the night, and I found I slept through the night and remained under the duvet every single night that I slept on it.

The topper did feel warm to the touch when I got up of a morning, but it certainly didn’t seem to make me overheat like I've experienced on a lot of denser memory foam sleep surfaces, and I never woke up in a pool of sweat.

This would seem to prove its breathability and that graphite-infused top layer were doing their thing and drawing any excess heat away from me.

The Simba Hybrid mattress topper on a grey upholsterd bed in white bedroom

(Image credit: Future)

Care instructions

The Simba Hybrid Topper has a removable top cover which unzips from the rest of the topper.

The cover can be machine washed at a maximum of 40°c. Simba just advises you don’t use too much laundry detergent as this can cause a build-up within the fabric, and avoid using harsh chemicals such as bleach. It can also be tumble-dried on a very low setting.

If you won't be using this topper on the bed permanently, then the fact it can be rolled up and secured with the straps also makes storage much easier.

The Simba Hybrid mattress topper rolled up on a mattress in a bedroom

(Image credit: Future)


The Simba Hybrid Topper isn't a budget buy, but it could save you money by extending the life of your current mattress or even removing the need to buy a new mattress at all.

The mix of springs with a memory foam upper layer means this mattress topper is comfortable and cushioning but also supportive and responsive, making it a good choice for both side and back sleepers.

I found that the graphite-infused open cell memory foam, and extra technology Simba has added to make this topper more breathable also meant it kept me at a comfortable temperature all night. In fact, I would go as far to say that I've had some of my best night's sleep on this mattress topper and I thoroughly recommend it.

I think it's really good topper choice whether you’re looking to revive an old mattress that's seen better days, you want to soften up a firm mattress or sofa bed, or you want to add a cooling layer to an all-foam mattress that's causing you to overheat.

Simba also offers a super long 200-night sleep trial that allows you to test this topper out for yourself and see if it's the right fit for you. The brand also states it either refurbishes or recycles any returns to keep them out of landfill.

In my opinion, its only real downside is its price. However, Simba deals are a regular occurence, so at various points throughout the year you should be able to snap it up for less.

Rachael Penn