Simba Natural Hybrid Apex King Size Mattress
The Simba Natural Hybrid Apex is a hybrid mattress, which means it pairs springs with comfort layers rather than relying on foam alone.
- Natural silk, cashgora & wool fillings
- Zoned support for your spine
- Mini springs reduce motion transfer
£1,473.99
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Simba Natural Hybrid Apex Mattress
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Mattress details
Mattress
Simba Natural Hybrid Apex Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Hybrid
Wool
Natural
Depth (cm)
32
Layers
3
Layer Details
Natural comfort layer
Several comfort layers of silk, cashgora and wool sit at the top. These natural fibres give the surface its cushioning, and the wool and silk fillings are what you'll feel first when you lie down.
Aerocoil springs
5700 conically shaped Aerocoil mini springs are spread across multiple layers. Because they are mini pocket springs, they reduce motion transfer, so you should notice less of your partner's movement.
CoreMax sprung base
Simba's exclusive CoreMax spring unit is zoned in seven areas and uses 1000 steel springs inside a reinforced steel frame. The zoning gives different parts of your body different levels of support, and the frame helps the base keep its structure.
Layer details from simbasleep.com and mattressonline.co.uk product pages, October 2026.
Key benefits
- Room for two proper sleep styles: With 75cm each for two people sharing, one of you can starfish slightly while the other sleeps undisturbed.
- Extra length for taller partners: At 200cm long, the UK king adds 10cm of length over a double, which matters once either of you is approaching six foot.
- Less disturbance on different schedules: If one of you gets up hours before the other, the wider surface and sprung hybrid construction help early exits go unnoticed.
- Depth that suits the size: The 32cm profile feels substantial across a 150cm width, giving a supportive, lifted feel rather than a thin platform.
- A sensible step below super king: The UK king is 30cm narrower than the UK super king, so you gain real space without demanding a huge bedroom.
This size suits you if...
You share the bed every night and a double has started to feel like a negotiation, one of you is over six foot and wakes with feet at the edge, or you keep different hours and want enough width that the early riser can slip out without waking the other. Allow at least 2.7m x 2.9m of bedroom space and the UK king fits comfortably.
Consider another size if...
You sleep alone, or your room falls short of the 2.7m x 2.9m we suggest for a UK king. In either case we'd recommend the UK double instead, which keeps the same feel in a more compact footprint.
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FAQ's
Is the Simba Natural Hybrid Apex UK king big enough for a couple?
Yes, comfortably for most. The UK king gives 75cm of width each for two people sharing, 15cm more overall than a UK double. Across a medium firm hybrid like this, that extra width means fewer accidental elbows and less waking each other during position changes. If you routinely share with a dog as well, consider the UK super king.
Is the UK king long enough for someone over six foot?
It should be. The UK king runs 200cm long, adding 10cm of length over a UK double, so a sleeper approaching or just past six foot gets clear space above and below rather than feet hanging at the edge. The 32cm depth also keeps you well away from the slats, which taller, heavier sleepers tend to appreciate.
What room size do I need for the Simba Natural Hybrid Apex in a UK king?
We suggest at least 2.7m x 2.9m, with around 3.2m x 3.2m feeling comfortable. That allows walking space on both sides and room for bedside tables. In a new build master bedroom, measure after accounting for wardrobes, as these rooms often feel smaller once furniture is in. This is our guidance, not Simba's.
Should I choose the UK king or the UK super king?
The UK king is 30cm narrower than the UK super king, so the super king wins on sheer sprawl. The king is the better fit where the room is tighter or you want space without the bed dominating. For most couples upgrading from a double, the 150 x 200cm king is the change you actually feel.
Where can I compare prices for this mattress in a UK king?
Use the price table on this page. The prices shown here are updated as retailers change them, so it reflects current UK king pricing rather than a snapshot. Larger sizes of premium hybrids like the Apex vary more between retailers than smaller ones, so a quick comparison before buying tends to pay off.