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Simba Hybrid Duvet Review

TSA reviewer Connie Hack

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Sleep Advisor

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14 November 2023 7 min read

In this Simba Hybrid Duvet review, we're going to determine whether this hybrid duvet can keep you comfortable and cosy year round!

Simba is known for making high-quality products, but is that the case with their new Simba Hybrid duvet? On paper, it sure seems so. However, before we start gushing over this seemingly perfect duvet, we wanted to put it to the test and find out whether that’s really the case. What was our final verdict? Well, let’s find out in our Simba Hybrid duvet review!


An icon depicting a leaf indicating hypoallergenic properties
100% hypoallergenic
Safe for people with allergies.
An icon depicting a thermometer illustrating a good thermo regulating properties
Thermo regulating
You won't be cold nor you get hot.
An icon depicting a magnifier indicating high quality
High quality & durable
It will last long time.


An icon depicting a money bag indicating an expensive product
High price tag
Super expensive when compared to similar duvets.
An icon depicting no warranty
1 year warranty
You get 1 year warranty only.

Who is the Simba Hybrid duvet for?

To start off our Simba Hybrid Duvet review, let's see who this product is even for! If you're in need of a highly durable, high-quality duvet that you can use all year round, then, Simba duvet is the right choice for you. 

This is a two-sided duvet with temperature regulating properties and a 10.5 tog rating, making it ideal for all seasons and for those who have trouble maintaining a consistent body temperature at night.

The duvet is an upgraded version of the old duvet – redesigned, but true to its origins. It also uses space-inspired technology that ensures optimal temperature and airflow.

What do we use this product for?

Simba Hybrid is a duvet that you can use all year round. It's double-sided, with one side being the cool one and the other being warm. It's perfectly balanced at 10.5 tog, and as a cherry on top – unlike the previous model, this duvet is actually hypoallergenic.

Is the Simba Hybrid Duvet an upgraded version of a previous Simba duvet?

Yes. Simba Hybrid is the new and improved version of the previous Stratos Hybrid duvet, which has  been discounted since. Unlike the previous model, this one is hypoallergenic, lightweight and made from recycled, via more sustainable methods. Overall – this is a much better all-around product that will never get out of date. especially due to its high quality cotton, higher thread count, widespread central heating/cooling.

Features you should know about the Simba Hybrid duvet

Just like any other duvet – the duvet has its own set of defining features and characteristics that we wanted to talk to you about. Considering all the features, we can say safely that this is a a perfect all year rounder.

a close-up shot of Simba hybrid duvet
300 thread cotton

As we’ve already said, this is a two-sided duvet. Both sides of this duvet are made from pure, 300 thread count BCI cotton. The only difference is – the cool side is enriched with Simba’s own Stratos technology, but we’ll get to that in just a second. As you know, cotton is naturally hypoallergenic and great at wicking away excess moisture. Therefore, staying cool, dry and allergy-free shouldn’t be an issue for you.

Furthermore, the cotton cover is square pocket-stitched, ensuring that the super-soft fillings of the duvet are evenly spread – preventing lumping or bunching. Therefore, it is super soft and highly recommended for sensitive skin.

Stratos temperature regulation layer

Stratos temperature regulation layer is what makes this duvet easily usable throughout the whole year. Now, Simba’s explanation of the Stratos technology is pretty vague, which is reasonable, considering it does a wonderful job keeping things cool and they wouldn’t want their competition to get a hold of it. To protect astronauts, the engineers had to come up with a new technology that was specifically designed for staying cool/warm without getting sweaty.

So, it was originally developed for space missions. But, all we know is that Stratos is an astronaut-inspired, phase change technology that is applied to cotton. Stratos promises to absorb, store and release excess heat when needed, and from what we've experienced during our testing – it delivers on its promises. Whether there are some temperature fluctuations, you will not get hot/cold no matter what.

Simba Renew fibres

With the new and upgraded Simba duvet, Simba decided to move on from the traditional feather and down fillings, as those could occasionally trigger allergies. Instead of feathers, Simba moved on to Simba Renew fibres.

Simba Renew is a recycled plastic bottle fibre filling embedded with minerals, which also help in regulating body heat. These synthetic, siliconised fibres are thin, light and super-soft – making them the perfect filling for an all-season duvet. 

Not only that, but Simba Renew fibres are also hypoallergenic, so you will no longer have to worry about dust mites or any other allergens that can find their way into and onto your duvet

Review of Simba Hybrid duvet

Our reviewer Sleeping under the Simba hybrid duvet

If we were to put it simply, this is easily one of the best all-season duvets we’ve ever had the pleasure of reviewing. Everything about it is good or better.  First of all, the duvet is very soft, light and comfortable. So, if you don’t prefer the hugging feeling of a duvet – this is just the right choice for you.

When it comes to the craftsmanship and quality of the materials used, we can only say – bravo! Materials feel premium and luxurious, the stitching and seams are flawless, the design is great, and the duvet looks pretty durable. The only thing we would change is the “Simba” label, which is kind of harsh and rigid, but that’s just nit-picking at this point.

The main selling point of this duvet is certainly its temperature regulation. And we have to say – this temperature regulating duvet is remarkable. The Stratos side (blue side) will keep you cool even during the hottest summer nights. 

Finally, the recycled Simba Renew fillings are super-soft, hypoallergenic and that’s pretty much all we could ask for.

On the other hand, even though this light duvet is advertised as machine-washable, in reality, it really isn’t. In most cases, the drum of the washing machine won’t be large enough to fit this duvet, so you will have to turn to professional cleaning when the time comes.


  • Cover: 100% BCI Cotton & 100% BCI Cotton with Stratos
  • Fillings: Simba Renew fibres
  • TOG: 10.5
  • Size: Single (200 x 135 x 4 cm), Double (200 x 200 x 4 cm), King (225 x 220 x 4 cm), Super King (260 x 220 cm x 4cm)

What we like about the Simba Hybrid duvet

What we didn't like about the Simba Hybrid duvet

Check the alternatives to the Simba Hybrid duvet

If case you’re not interested in Simba Hybrid for whatever reason, we decided to present you with the best alternative.

Panda Cloud duvet

a product image of panda cloud duvet

Panda Cloud is another all-season 10.5 tog duvet, only this time, instead of 100% fibre fillings, we’re looking at the mixture of bamboo and nano-fibre.

Once again, we’re looking at a hypoallergenic duvet, which is always lovely to see and unlike Simba Hybrid, this one comes with a 5-year warranty and a 30-night trial period.

The active temperature regulation is achieved via using bamboo-infused layer that keeps the heat away from your body and ensures you stay cool and moisture-free. Though it is not a down duvet, this can be a winter duvet but you can use it during the summer as well.

Read our detailed Panda Cloud duvet review.


An icon depicting an all season product
Great for all seasons
Perfect for all season use.
An icon depicting a thermometer illustrating a good thermo regulating properties
Thermo regulating
Great thermoregulating properties.
An icon depicting a medal indicating a warranty
5 year warranty
5-year warranty + 30-night trial.


An icon depicting a money bag indicating an expensive product
High price tag
Way more expensive than similar products.
An icon depicting a washing machine, illustrating a product that is not suitable for machine washing
Way too big for a washing machine
It is very unlikely you will put it in the standard washing machine.

Consider the Simba Hybrid pillow if you are buying the Simba hybrid duvet

a product image of simba hybrid pillow with stratos

If you want to add to your sleeping experience and stay in Simba Sleep family, you might consider getting Simba Hybrid Pillow.

This is another high-quality product from one of the leading brands in the United Kingdom. Once again, you’re looking at 300 thread count cotton enriched with Stratos technology, so you can be certain that you won’t flip your pillow looking for the cooler side.

Furthermore, this is a highly adjustable pillow, as the inside of it is filled with Nanocubes that you can add or remove to achieve desired thickness and firmness.

The Nanocubes are temperature regulating technologies that keep you cool but also ensure you an appropriate pillow loft. The high quality threads and are visible so you can tell it is a high-quality product at first sight.

Read our full review of the Simba Hybrid Pillow right here.


An icon depicting air passing through a fabric
Highly breathable due to Nanocube structure.
An icon representing an eco-friendly & sustainable concept
A great option for environmentally-conscious sleepers.
An icon depicting a thermometer illustrating a good thermo regulating properties
Good thermo regulation
Can keep you at an optimal temperature.


An icon depicting no trial or warranty
No trial
There's no trial period.
An icon depicting no warranty
Short warranty
The warranty is only one year.
An icon depicting a washing machine, illustrating a product that is not suitable for machine washing
Not machine washable
Cleaning the pillow is more difficult.

What makes this product better than some other similar ones?

Simba duvet is arguably the best duvet when it comes to regulating temperature all throughout the year. You won’t get too hot during the summer and you won’t feel cold during the winter and that is by far the most significant advantage of this duvet. 

How did we test the product?

Our reviewer testing a folded Simba hybrid duvet

As with any other product review, we approach our duvet reviews with a single goal in mind – to provide you with an unbiased, objective overview of the product. We try to be as thorough and detail-oriented as possible so that we don't miss anything that might be crucial to the overall quality of the product.

When it comes to Simba Hybrid duvet, the first step is ordering the product. The ordering process is very straightforward. You visit Simba's website, you select the appropriate duvet size, and you move on to the checkout.

At that point, all you need to do is enter the necessary information, and you should be on your way. Keep in mind, Simba does offer free delivery and returns, but in case there are some delivery fees, they will be calculated during the next step, so you won't experience any undisclosed additional costs.

The next step is unboxing. The package was delivered rather quickly and there weren’t any visible signs of damage on the packaging. However, we did find it a bit annoying that the duvet was wrapped in layers of plastic wrapping, especially because Simba Sleep is known for using sustainable and eco-friendly materials in most of its products.

Upon further inspection, we’ve determined that the duvet was in perfect condition. The pocket stitching and seams were flawless, and there was a clear distinction between the “cool” and “regular” side of the duvet, so we didn't really feel the top/tail label was necessary. The “cool” side felt sticky, plasticky and very cool to the touch, but none of that was uncomfortable once we’ve put the duvet inside the covers. 

We've spent two nights under the duvet and we have to say – the difference between the cool and regular side is very noticeable. Both sides did what they were designed to do, and the overall feel of the mattress was more than comfortable. It was pleasant, cosy and not at all heavy, as was the case with a previous rendition of Simba Hybrid. 


And that concludes our Simba Hybrid Duvet review! So, what do you think? Are you going to get the Simba Hybrid Duvet for yourself? Let us know in the comment section. And if you have any questions, check out the FAQ section or contact us directly.

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FAQs about your Simba Hybrid duvet

In the end, we wanted to wrap things up by answering some of the most frequently asked questions about Simba Hybrid. As we’ve previously mentioned, due to the high popularity within the United Kingdom, this Simba duvet has been redesigned over the years, so we wanted to clear up any confusion that might be there.

Is Simba Hybrid duvet suitable for hot sleepers?

Yes. Simba’s Stratos technology makes this duvet more than suitable for people that sleep hot.

How do I wash my Simba Hybrid duvet?

Unless you have a very large washing machine, we suggest that you wash your Simba duvet professionally.

Does Simba Hybrid duvet come with a duvet cover?

No, the Simba Hybrid duvet does not come with a duvet cover. However, we would advise using a duvet cover to prolong the life of your duvet.

Is Simba Hybrid duvet prone to moisture retention?

No. The upgraded rendition of the Simba Hybrid isn’t prone to moisture retention, mostly due to the Simba Renew fibres that fill up the duvet.

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