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Goes like a dream with


Engineered for cool comfort

Cotton cover with Stratos® heat control technology

Stratos® tech is designed to draw heat away and providing an instant cooling sensation.

Summer duvet storage bag

Includes sturdy, storage bag

  • Cotton cover with Stratos® heat control technology
  • Super-soft, Simba Renew Bio™ fibres
  • Cotton cover (plain side)

5Ingenious things about the Summer Hybrid® Duvet

We use our engineering expertise and the latest tech to bring you your best night’s sleep ever… Here’s how it works in this 4.5 Tog duvet.

Renew Bio™

Exceptional comfort

Simba Renew Bio™ forms the lightweight, down-like centre of our luxurious Hybrid® duvets; it’s made from recycled PET bottle fibres, gently combed into soft, airy layers of comfort. It’s also designed to allow plenty of airflow through the duvet fill for perfect, non–clammy warmth.

temperature control 

AKA your duvet thermostat

Getting too hot at night is a common and disruptive sleep problem, especially during the warmer nights of Summer. Which is where our thinner, 4.5 Tog duvet comes in.

But that’s not the only way Simba helps keep you cool. Because all our Hybrid® duvets feature our ingenious Stratos® technology on one side; this makes the fabric feel instantly fresh to the touch, and it supports the dissipation of any excess heat to help you feel fresh and dry all night long. Even when it has a cover on it. Just make sure this side is closest to you as you sleep to get the full effects.


Sustainable comfort

Simba Renew Bio™ is key to the superb comfort and quality of our pillows and duvets. It’s made from recycled PET bottle fibres. But it also biodegrades at end of life and almost totally dissolves in about two years when deposited in a landfill environment.
The biodegradability of Simba Renew Bio™ has been tested under ASTM (American Society for Testing & Materials) conditions with the following results: 93.8% biodegradation in 646 days under ASTM D5511 conditions (accelerated landfill environment); 86.1% in 1563 days under ASTM D6691 conditions (accelerated marine/ocean environment). The stated rate and extent of degradation do not mean the product will continue to degrade.

We also use cotton in our duvets, but we’re careful where it comes from , so we’re also delighted to be a member of the Better Cotton Initiative

makes perfect

User-friendly, thoughtful design

There’s no point having all this ingenious tech if you forget the practical stuff. So of course - we haven’t. Our Hybrid® duvet is stitched into squares to prevent clumping, it’s machine washable (in a large enough machine) and dries quickly due to the lightness and nature of the fill fibres.

We’ve also added a QR code to a label on the duvet for easy access to recycling or care advice – and we’ve popped another label at the foot end of the duvet, so you’ll always know which way round it goes.

5 Our recipe for a sustainable sleep (The story so far)

B corp logo
100% Cotton Cover
100% recycled/biodegradable filler (40 bottles per King 4.5 Tog duvet)
100% recycled storage bag 
50% recycled packaging  
All deliveries 100%
carbon neutral
Certified eco-factory (100% renewable energy, 100% waste recycled). 
Target of Net Zero by 2030

Menopause Friendly

Our products that carry the GenM Menopause Friendly symbol can ease, relieve or support one of more of the 48 symptoms and signs of menopause.

Happy Sleepers

We rest better when we know your honest opinion of us. Check out reviews from Simba sleepers below.

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