Simba Natural Hybrid Source Single 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
£674
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Simba Natural Hybrid Source Mattress
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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
- Fits the smallest rooms: At 90cm wide it leaves floor space free in box rooms, loft conversions and bedrooms where a desk or wardrobe already claims a wall.
- Full support from childhood to adulthood: The medium firm feel and spring core give growing children and teens proper spinal support, and it won't need replacing the moment they get taller.
- Genuine depth for a single: The 28cm depth means a solo adult gets the same mattress a UK super king buyer does, with nothing scaled back for the smaller size.
- Sensible for guest rooms: A hybrid that sleeps cooler than all-foam suits occasional guests of any age, and the single footprint leaves a spare room usable as an office between visits.
- Cheap, easy bedding: Single sheets and duvets are the most widely stocked of any size, which keeps running costs down for kids' rooms and guest beds alike.
This size suits you if...
You're buying for a child or teenager moving up from a cot or toddler bed, you're a solo adult in a compact room or first flat where a frame is already provided, or you're setting up a spare room that needs to hold guests a few nights a year without giving up its day job as an office.
Consider another size if...
You're an adult who spreads out in the night, or you're buying for a teen with room to spare. We'd recommend the UK small double instead, which gives 30cm more width for the same length.
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FAQ's
Will the Simba Natural Hybrid Source UK single fit a bunk bed?
Check your frame's guard rail height first. This mattress is 28cm deep, which is on the taller side for bunks, cabin beds and mid sleepers, where safety guidance usually requires the rail to sit well above the mattress surface. The 90 x 190cm footprint matches standard UK bunk frames; it's the depth you need to verify.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space. That gives you room to walk alongside the bed and open drawers or a wardrobe. In a child's room competing with toy storage and a desk, the 90cm width is what makes everything fit, and it also allows two singles plus a walkway where siblings share.
Is the UK single big enough for an adult to sleep on?
For most solo adults, yes. At 90cm wide and 190cm long it's the standard UK one-person size, and the 28cm depth and spring support don't change with size. Taller adults should note the 190cm length, slightly shorter than a UK king. If you move around a lot at night, the UK small double gives more room.
Is the Simba Natural Hybrid Source a good mattress for a child?
It's a reasonable choice for children and teens who've outgrown a starter mattress. Medium firm support suits growing bodies better than a soft, sinking surface, and the hybrid construction sleeps cooler than memory foam. It sits at the pricier end for a kids' bed, but it should carry them through to adulthood rather than needing an upgrade.
Where can I buy the Simba Natural Hybrid Source in a UK single?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so it's worth checking back before you commit, as the same size can vary between sellers from week to week.