Simba Hybrid King Size Mattress
The Simba Hybrid is a 25cm hybrid that pairs up to 1,900 Aerocoil® conical microsprings with graphite-infused Simbatex® foam, which means springy, responsive support with the graphite there to draw heat away as you sleep.
- Minimises partner disturbance
- Graphite foam keeps you cooler
- 200-night trial & 10-year guarantee
£749
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Simba Hybrid Mattress
More available sizes
Mattress details
Mattress
Simba Hybrid Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Hybrid
Rolled
Depth (cm)
25
Layers
5
Layer Details
Breathable knitted cover
A soft knitted cover with a zip off top layer you can machine wash.
Simbatex comfort layer
An extra deep, open structure foam infused with graphite, designed to cushion while moving heat away from the body.
Aerocoil microspring layer
Up to 1,900 conical titanium alloy microsprings, made in Leeds, that compress individually, which means support that follows your body and less movement felt across the bed.
Stabilising core foam
A thick, open structure CertiPUR certified foam layer that aids structural support and airflow.
Nine zoned support base
A zoned CertiPUR foam base giving firmer support where heavier areas like hips and shoulders need it.
Specification: Simba, September 2026.
Key benefits
- Space that changes how you sleep: The UK king is 15cm wider than the UK double, which means each of you can turn over without brushing a shoulder.
- Movement stays on their side: Up to 1,900 Aerocoil microsprings compress individually, so an early alarm on one side is far less likely to wake the other.
- Length for taller sleepers: At 200cm long, a partner approaching six foot gets their feet on the mattress rather than hanging off it.
- Cooler across a bigger surface: The graphite infused Simbatex layer draws heat away, useful when two warm bodies share one bed every night.
- Support where a couple needs it: The nine zoned base firms up under hips and shoulders, and it does so for each sleeper separately across the width.
This size suits you if...
You share the bed every night and the UK double has started to feel cramped, especially if one of you sleeps warm or gets up hours before the other. It also suits couples where one partner is tall enough for the 200cm length to matter, or anyone sharing with a dog that claims more than its share of the mattress.
Consider another size if...
Your bedroom is smaller than the 2.7m x 2.9m we suggest as a minimum for a king, a common squeeze in new build masters once wardrobes go in. We'd recommend the UK double instead, which keeps the same Simba Hybrid feel in a narrower footprint.
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FAQ's
Is a UK king Simba Hybrid big enough for a couple?
Comfortably, for most. The UK king measures 150 x 200cm, giving 75cm each for two people sharing, and the microspring layer keeps one sleeper's movement from travelling across the bed. If one of you sprawls, or a pet routinely joins in, the UK super king at 30cm wider is the roomier option.
Will a UK king Simba Hybrid fit in my bedroom?
We suggest a room of at least 2.7m x 2.9m for a UK king, which leaves space to walk round and open drawers. Measure with wardrobes and bedside tables in place: new build master bedrooms often feel tighter than the floor plan suggests. If the room falls short, the UK double is the safer fit.
Is the king long enough for a tall sleeper?
The UK king runs to 200cm, or 5ft x 6ft 6in overall, so someone approaching six foot has headroom to spare. That extra length is often the real reason to size up from a UK double, which is shorter as well as 15cm narrower.
How much wider is the king than the sizes either side?
The UK double at 135cm is 15cm narrower than the UK king, and the UK super king at 180cm is 30cm wider. The king sits in the middle: a noticeable upgrade in personal space without the room a super king demands, which is why so many couples land on it.
Where can I compare prices on this size?
Prices for the Simba Hybrid in a UK king move around, so we list live figures rather than printing one here. Compare the retailers shown on this page: the prices update as retailers change them, which makes it easy to see who is cheapest today rather than last month.