Simba Natural Hybrid Apex 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
£937.99
Get the lowest price we've found
The Simba Natural Hybrid Apex comes in at a generous 32cm deep, listed on Simba's own site, so it has a noticeably taller profile than many boxed mattresses. It's listed as medium firm, a feel that suits most sleepers, although lightweight side sleepers may find it a touch too solid. It sits firmly in premium territory, so this is a considered purchase rather than a budget pick. It's available in UK Single, Double, King and Super King.
Mattress specifications
Firmness
Medium Firm
Type
Hybrid
Depth (cm)
32
Number of Layers
3
Trial Period (nights)
Warranty (years)
Price Range
£937 to £1,808
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
Assessed from Simba's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
The main draws here are depth and feel. At 32cm, the Apex is a substantial mattress, and that extra height usually translates to a more supportive, less 'close to the slats' feel than slimmer models. The medium firm rating makes it a sensible middle ground: enough give for side sleeping, enough push-back for backs and fronts. It carries a feed rating of 4.7 via Mattress Online, which is reassuring, and a retailer listing mentions a 10 Year Guarantee, though you should confirm guarantee terms with whichever retailer you buy from. The starting price is a lot. If the depth and hybrid build matter to you, it may justify itself.
Key features & 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.
Best suited for?
Back sleepers
The medium firm feel gives enough push-back to keep the body well supported, and the 32cm depth adds a less 'close to the slats' feel.
Front sleepers
Medium firm push-back means the hips are less likely to sink too far, which suits lying on your front, helped by the substantial 32cm depth.
Combination sleepers
Medium firm is described as a sensible middle ground, with enough give for side sleeping and enough push-back for backs and fronts as you change position.
Couples
Available in Double, King and Super King, this mattress gives two people room to spread out, with a medium firm feel that suits most sleepers.
Skip this one if you're on a tighter budget: the starting price puts it out of reach for many. Lightweight sleepers who prefer a soft, cradling surface may find medium firm slightly too solid. And at 32cm deep, it may sit taller than some fitted sheets and bed frames comfortably allow, so measure first.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Simba Natural Hybrid Apex Mattress
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Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
How firm is the Simba Natural Hybrid Apex?
It's listed as medium firm, which sits in the middle of the scale with a slight lean towards support. That tends to suit back and front sleepers well, and most side sleepers too, although lighter side sleepers may find it a little firm through the shoulders.
How deep is the Simba Natural Hybrid Apex mattress?
Simba's own site lists it at 32cm deep, which is taller than many mattresses. It's worth checking your fitted sheets, as standard ones can struggle with deeper mattresses.
What sizes does the Simba Natural Hybrid Apex come in?
Four UK sizes: Single, Double, King and Super King.
Does the Simba Natural Hybrid Apex come with a guarantee?
A retailer listing shows a 10 Year Guarantee, but Simba's own product page doesn't currently state guarantee terms. Confirm the exact cover with the retailer you buy from before ordering, as terms can differ between sellers.
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