Firmness
Medium Firm
Type
Hybrid
Depth (cm)
28
Number of Layers
Trial Period (nights)
Warranty (years)
Price Range
£899 to £1,599
Best Sleeping Position(s)
Certifications
Features CertiPUR® certified foams, ensuring no harmful chemicals.
Assessed from Simba's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
If provenance matters to you, this mattress is made and finished in Hampshire, and Simba positions it around natural materials rather than all-foam construction. It's a hybrid, which means springs provide the core support while comfort layers soften the surface, a combination that tends to sleep cooler than memory foam alone. The 28cm depth is generous and consistent across all four sizes, so a Super King feels no shallower than a Single. At £899 to £1,599 it sits at the pricier end, but Mattress Online lists a 10 year guarantee, which offers some reassurance for the outlay. Yes, the published detail is thin, but the fundamentals here are sound.
Key Features & what's inside
Awaiting up to date specifications. Please check back later.
Who's it NOT for?
If you like to research every layer before buying, the lack of published construction detail may frustrate you. Lightweight side sleepers who need a softer, more contouring surface could find medium firm slightly too solid. And at £899 upwards, budget-focused buyers will find cheaper hybrids elsewhere.
Simba Natural Hybrid Source Mattress
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How firm is the Simba Natural Hybrid Source mattress?
It's listed as medium firm, which suits most back and combination sleepers. Side sleepers with a lighter build may find it a little too firm, as they often need a softer surface to relieve pressure at the shoulder and hip.
What sizes does the Simba Natural Hybrid Source come in?
Four UK sizes are available: Single, Double, King and Super King. Every size is the same 28cm deep, so you get the full mattress height whichever you choose. Prices range from £899 to £1,599 depending on size.
Does the Simba Natural Hybrid Source have a guarantee?
Mattress Online lists a 10 year guarantee for this mattress. Simba's own product page doesn't state guarantee terms, so it's sensible to confirm the cover with your chosen retailer before you buy.
Where is the Simba Natural Hybrid Source made?
Simba states the mattress is made and finished in Hampshire, in the UK. The brand describes it as using nature's best materials, although the product page doesn't break down the specific composition of each layer.
Is the Simba Natural Hybrid Source a memory foam mattress?
No, it's a hybrid, which means it pairs springs with comfort layers rather than relying on foam alone. Hybrids generally sleep cooler and feel more responsive than all-foam mattresses, which is helpful if you tend to overheat at night.
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