Simba Natural Hybrid Source Super King Mattress
The Simba Natural Hybrid Source is a medium firm hybrid mattress, made and finished in Hampshire, that combines springs with what Simba describes as nature's best materials.
- Made & finished in Hampshire
- Built around natural materials
- Medium-firm sprung support
£1,199
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Simba Natural Hybrid Source Mattress
More available sizes
Mattress details
Mattress
Simba Natural Hybrid Source Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Hybrid
Wool
Natural
Depth (cm)
28
Layers
4
Layer Details
Viscose plant-based cover
The top layer is a viscose cover made from sustainable, plant-based fibres. It's the part you lie on, so it gives the mattress a plant-based surface rather than a synthetic one.
Hampshire wool comfort layers
Two layers of Hampshire wool sit above three further layers of British wool, giving five layers of wool cushioning in all. That adds softness over the springs and a natural-fibre feel, though the firmness is still medium firm.
Aerocoil mini pocket springs
These are precision-made mini springs in British steel, and one source gives the count as 1900. Each spring is pocketed, so the support is shaped to your body, which helps the surface follow your curves.
CoreMax pocket spring base
A glue-free base of British steel pocket springs, arranged in seven zones. The zoning gives different areas of the body different support, and the glue-free build means the base relies on its springs rather than adhesive.
Layer details from simbasleep.com and mattressnextday.co.uk product pages, October 2026.
Key benefits
- 90cm of width each: Two people sharing get 90cm each, which means a partner who turns over all night becomes something you sleep through rather than around.
- Room for the whole household: When children appear at 3am or a large dog treats the bed as routine, this size absorbs the extra body without anyone losing their share.
- 30cm wider than a UK king: That extra width over the UK king is the difference between comfortable and genuinely undisturbed, especially if one of you is a light sleeper.
- Full depth at full width: The 28cm depth holds across every size, so the super king feels no shallower than the smaller versions despite covering far more area.
- Springs that suit a big bed: The hybrid build puts springs at the core, which means consistent support edge to edge rather than a soft middle across such a wide surface.
This size suits you if...
You share the bed every night and want distance from a restless partner, your children or pets regularly end up in with you and you'd rather everyone kept their space, or you have a large master bedroom where a smaller bed would look and feel undersized. We suggest a room of at least 3m x 2.9m, with something nearer 3.5m x 3.2m feeling comfortable.
Consider another size if...
Your bedroom falls below our suggested minimum of 3m x 2.9m, or you'd struggle to get a mattress this size up your stairs or round a tight landing. We'd recommend the UK king instead, which keeps the same 200cm length in a narrower footprint.
Similar Mattresses in This Price Range
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 much bigger is the Simba Natural Hybrid Source super king than the king?
The UK super king is 30cm wider than the UK king, with both sharing the same 200cm length. That extra width is spread across the whole bed, so each sleeper gains breathing room rather than one side getting it all. If a UK king has ever felt crowded with two of you, this is the fix.
Is the Simba Natural Hybrid Source super king big enough for a family?
For occasional company, yes. At 180cm wide it gives two adults 90cm each, so a small child climbing in during the night doesn't push anyone to the edge. It's the practical choice for parents in the co-sleeping years, though a child in the bed every night will still test any mattress.
Will the Simba Natural Hybrid Source super king fit in my bedroom?
We suggest a room of at least 3m x 2.9m, and around 3.5m x 3.2m feels right once you add wardrobes and walking space. Check your door swing and any turns on the stairs or landing too, since a mattress this size is the one most likely to catch on the way up.
Is the super king the largest size this mattress comes in?
Yes. Simba makes the Natural Hybrid Source from UK single up to UK super king, and the super king, at 180 x 200cm, is the biggest of the range and the largest size UK retailers stock as standard. Depth stays at 28cm, so you're gaining width and length, never losing height.
What bedding will I need for this super king?
Standard super king sheets fit the 180 x 200cm footprint, and a 260 x 220cm duvet is the usual pairing. Fewer shops carry this size than a UK double or UK king and it tends to cost a little more, so factor bedding into your budget alongside the mattress itself.