Simba Hybrid Pro Core Double Mattress
The Simba Hybrid Pro Core Mattress combines a Stratos cool-touch cover and British wool with Aerocoil microsprings, which means you get a breathable surface and targeted support at your hips and shoulders.
- Cool-touch cover keeps you fresher
- Targeted support at hips & shoulders
- 200-night trial & 10-year guarantee
£1,099
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Simba Hybrid Pro Core Mattress
More available sizes
Mattress details
Mattress
Simba Hybrid Pro Core Mattress
Size
Firmness
Medium Firm
Construction
Foam
Hybrid
Pocket Spring
Wool
Depth (cm)
28
Layers
8
Layer Details
Soft, cooling cover
A zip-off, washable cover with Stratos tech that prevents heat build-up. It keeps the surface cooler and is easy to keep clean.
Natural wool layer
A soft layer of British wool that Simba says enhances breathability and comfort. It helps the surface feel fresh and cushioned.
Fresh Simbatex foam
Foam designed to enhance airflow, with elasticity for cushioning. You get some give on top without trapping heat.
High-elasticity CertiPUR foam layer
A CertiPUR foam layer engineered for elasticity. It adds a cushioned feel and springs back as you move.
Titanium alloy Aerocoil springs
Patented microsprings designed to support parts of the body with specific needs, such as hips and shoulders. They respond independently, so support is targeted where you need it.
Stabilising core foam layer
A CertiPUR foam layer that provides structural support and extra airflow. It steadies the layers above and helps air move through the mattress.
SupportCore sprung base
Up to 1,000 pocketed, tempered steel barrel springs for firm edge-to-edge support with no roll-off. You can sit or sleep near the edge and still feel supported.
High-density foam base
A CertiPUR foam base that works with the SupportCore springs to deliver stability and support. It gives the whole mattress a steady foundation.
Layer details from simbasleep.com product page, November 2026.
Key benefits
- Edge support for a shared size: The pocketed SupportCore springs reach edge to edge, which means the outer strip of a UK double stays usable when you're sleeping close to the side.
- Fits where a king would crowd: At 135 x 190cm, the UK double leaves room for a wardrobe and drawers in rooms where a UK king would leave you edging sideways around the frame.
- Independent springs for two bodies: The Aerocoil microsprings respond separately under each of you, so a partner's hips and shoulders are supported without the surface dipping across into your half.
- A cooler surface with less room to spread: Sharing 135cm keeps two bodies close, and the Stratos cover over British wool is designed to stop heat building up between you.
- Bedding that's easy to find: Double sheets and a 200 x 200cm double duvet fit the UK double, and they're sold almost everywhere, which helps when you're furnishing a whole home at once.
This size suits you if...
You share the bed with a partner in a typical UK bedroom and want a medium-firm hybrid without giving up floor space, or you're setting up a guest room where visiting couples will stay a night or two, or you sleep alone but a dog or cat insists on its own corner.
Consider another size if...
Either of you sprawls or is tall, because 190cm length and 67.5cm each can feel close. The UK king would suit you better; we suggest at least 2.7m x 2.9m for it.
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FAQ's
Is a UK double Simba Hybrid Pro Core big enough for two adults?
For most couples, yes. You each get 67.5cm of width, and the SupportCore springs keep the edges supportive, so the outer part of each side stays usable. If either of you is tall or a restless sleeper, the UK king gives 7.5cm more each and is 10cm longer.
What size room do I need for a Simba Hybrid Pro Core double?
We suggest at least 2.6m x 2.8m for a UK double, with around 3m x 3m feeling comfortable. If you want bedside tables on both sides, measure from the wall with the bed in place, because a headboard and frame add to the 135 x 190cm mattress itself.
Simba Hybrid Pro Core double vs king: which should a couple choose?
The UK double is 15cm narrower and 10cm shorter than the UK king. Choose the UK double if your room is closer to 2.6m x 2.8m and you need space for furniture. If your room clears our suggested 2.7m x 2.9m for the UK king, the extra width per sleeper is worth having.
Will a UK double hybrid mattress get up narrow stairs?
It can be awkward. The Simba Hybrid Pro Core is 28cm deep with springs and foam, so it is less flexible than a thin foam mattress. In an older terrace with a turning staircase or a tight new build landing, measure the stairs first, then compare the retailers listed on this page.
Is a Simba Hybrid Pro Core double too big for a second bedroom?
Often it fits fine. The UK double is 15cm wider than the UK small double but the same length, so if a small double would fit with a wardrobe and drawers, the double may too. If your room sits below our suggested 2.6m x 2.8m, the UK small double is the safer choice.