Simba Natural Hybrid Apex Mattress Review
Eleven layers, 32 centimetres, up to 6,700 springs and a cashgora, silk and wool blend. The fibre choices genuinely justify part of the price here.
I earn a commission if you buy through some links on this page. It never changes what I recommend, and I publish negative verdicts on brands I earn from. Editorial independence.
Verdict
Eleven layers, 32 centimetres, up to 6,700 springs and a cashgora, silk and wool comfort blend at a plush firmness. This is the most luxurious thing Simba makes in natural materials, and it is the mattress where the fibre choices genuinely justify part of the price rather than decorating it.
Buy it if
You want premium natural materials, a plush feel, and you are buying for the fibres as much as the construction.
Avoid it if
You are optimising springs per pound, or you want firm support. Plush at 32cm needs the right body for it.
See the current Simba offer
Community heroes get up to 31% off everything. Refurbished stock carries the deepest savings.
No code needed. The discount is applied automatically at checkout. Opening the site in a new tab.
Simba on Amazon UK
Check the seller. The 200 night trial applies buying direct.
No code needed. Prices on Amazon change frequently, so check the seller and the returns terms before you buy. Opening in a new tab.
| Specification | Detail |
|---|---|
| Type | Hybrid with premium natural fillings |
| Depth | 32cm |
| Layers | 11 |
| Springs | Up to 6,700 |
| Comfort blend | Cashgora, silk and wool |
| Firmness | Plush |
| Price from | £1,499 |
The scores
Genuinely premium materials on a serious spring structure. The price is the only objection.
Fifteen hundred pounds. The fibres are real, and Origin's LumbarCloud is 797 with more spring.
Up to 6,700 springs at 32cm, which supports a plush surface properly.
Wool, silk and a deep spring layer. Among the best moisture handling available.
Deep multi-layer spring construction holds the perimeter.
Very little transmits at this spring density.
200 nights and 10 years with Simba's returns operation.
Cashgora, silk and wool, and what each one does
Three natural fibres, doing three different jobs. Worth separating because the marketing presents them as one luxury bundle.
Wool is the workhorse and the one I would pay for. It absorbs moisture vapour into the fibre without feeling wet and releases it as conditions change, which buffers humidity rather than just temperature. It is also naturally flame resistant, reducing the chemical treatment needed to meet UK regulations.
Silk is smooth, strong for its weight and thermally neutral. It contributes surface feel more than performance. Pleasant, and the least functionally important of the three.
Cashgora is a cross between cashmere and mohair goats. The fibre is fine and insulating, softer than mohair and more resilient than cashmere. In a comfort layer it adds loft that recovers well, which matters on a plush mattress where the surface is compressed nightly.
The blend is genuinely well chosen rather than assembled for the marketing copy, and the resilience point about cashgora is the reason it is in a plush mattress specifically.
Plush at 32 centimetres needs the spring count
I have made this point on the Otty Pure+ 4000 and the Brook + Wilde Lux, and the Apex is the example of it done right.
A plush surface means you sink, which means the mattress must form itself around your shape. That requires enough springs for each region to respond independently. Up to 6,700 springs beneath a plush comfort layer is the correct pairing. A plush mattress with 1,000 springs is a hammock waiting to happen.
This is why plush mattresses are expensive and firm ones can be cheap, and it is one of the few places in this category where price genuinely tracks engineering.
A correction worth making
Commonly repeated, and wrong
Luxury natural fibres in mattresses are routinely presented as interchangeable markers of quality, with silk, cashmere and wool used almost as synonyms in marketing copy. They do different jobs. Wool manages moisture and adds flame resistance. Silk contributes surface feel and little else functionally. Cashgora adds resilient loft that recovers under repeated compression. A blend is worth paying for when the fibres are chosen for those properties, and not when they are listed to signal expense.
Should you buy it?
Yes if you want premium natural materials and a plush feel, and you accept that you are paying a premium for fibres rather than for spring count.
If construction per pound is the measure, Origin's Hybrid Pro and the refurbished Simba Hybrid Ultra both give you more for far less.
Questions people ask
What is cashgora?
A fibre from a cross between cashmere and mohair goats. It is fine and insulating, softer than mohair and more resilient than cashmere. In a comfort layer it adds loft that recovers well, which matters on a plush mattress where the surface is compressed nightly.
Why do plush mattresses cost more than firm ones?
Because a plush surface means you sink, so the mattress must form around your shape, which requires enough springs for each region to respond independently. A plush mattress with a low spring count becomes a hammock. Plush needs engineering that firm does not.