Simba Hybrid Pro Core Small 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
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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
- Space to sprawl on your own: At 30cm wider than the UK single, you can sleep diagonally or flat out on your front without an elbow hanging over the side.
- Edges you can actually use: The SupportCore springs are built for firm edge-to-edge support, so sitting on the side to get dressed or sleeping close to the edge feels steady.
- Suits compact rooms: We suggest a room of at least 2.4m x 2.8m, which suits box rooms and loft conversions where a UK double would leave you squeezing past the frame.
- Easy to find bedding for: 4ft is a standard UK width, so small double fitted sheets are easy to buy and a standard double duvet covers it comfortably.
- Cover that copes with spare-room life: The zip-off cover goes in the washing machine, which helps in a guest room between visitors or in a teenager's bedroom that sees the odd spilt drink.
This size suits you if...
You sleep alone and have outgrown a single, your bedroom is too compact for a UK double to sit comfortably, or a couple only stays over now and then, such as in a guest room or a small second bedroom.
Consider another size if...
You share the bed every night, because two adults will feel cramped at 120cm wide. We'd recommend the UK double instead, which gives 67.5cm each; allow at least 2.6m x 2.8m for it.
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FAQ's
Can two people sleep on a Simba Hybrid Pro Core small double?
For a weekend visit, yes. The springs support right to the edges, so neither of you is pushed into a dip. For nightly sharing it's a tight fit, and we'd recommend the UK double, which gives 67.5cm each, or the UK king at 75cm each if your room allows at least 2.7m x 2.9m.
What size room do I need for a UK small double Simba Hybrid Pro Core?
We suggest at least 2.4m x 2.8m. That leaves enough floor to walk round the bed and open the door, which matters in a box room or a loft conversion where sloping ceilings cut the usable space beside the bed.
Is the Simba Hybrid Pro Core in a UK small double long enough for a tall person?
It measures 190cm long, or 6ft 3in, the same length as the UK single and UK double. If you're tall enough for your feet to reach the end, the UK king is 10cm longer, although it's also 30cm wider and needs a bigger room.
Is a UK small double Simba Hybrid Pro Core a good upgrade for a teenager?
It's a sensible step up from a single. It's 30cm wider but the same length, so it takes only a little more floor space, and the medium-firm feel gives a growing back steady support. The washable cover helps too.
What sheets and duvet fit a Simba Hybrid Pro Core small double?
Use small double (4ft) fitted sheets and a standard double duvet. The mattress is 28cm deep, so check the pocket depth on the fitted sheet before you buy, because shallow pockets can pull loose at the corners.