Simba Hybrid Mattress
Mattress
Simba Hybrid Mattress
Size
Firmness
Medium-firm
Construction
Foam
Pocket Spring
Hybrid
Rolled
Depth (cm)
25
Layers
5
Layer Details
1. Breathable knitted cover
A soft knitted cover with a zip off top layer you can machine wash.
2. Simbatex comfort layer
An extra deep, open structure foam infused with graphite, designed to cushion while moving heat away from the body.
3. Aerocoil microspring layer
Up to 1,900 conical titanium alloy microsprings, made in Leeds, that compress individually, which means support that follows your body and less movement felt across the bed.
4. Stabilising core foam
A thick, open structure CertiPUR certified foam layer that aids structural support and airflow.
5. Nine zoned support base
A zoned CertiPUR foam base giving firmer support where heavier areas like hips and shoulders need it.
Specification: Simba, September 2026.
- Fits where space is tight: At 90cm wide, a single leaves floor free for a desk, wardrobe or toy storage, and we suggest a room of at least 2.1m x 2.8m.
- Cooler for warm young sleepers: The graphite infused Simbatex layer draws heat away, which means teenagers who run hot at night should sleep more comfortably than on plain memory foam.
- Grows with a child: The nine zoned base gives firmer support under hips and shoulders, so it should still suit a teenager years after you buy it.
- Sensible for guest rooms: A spare room set up with a single, or two, keeps floor space usable the rest of the year while still giving guests a properly supportive mattress.
- Check raised frames first: At 25cm deep it is thicker than many children's mattresses, so measure the guard rail height on a bunk, cabin or mid sleeper before ordering.
This size suits you if...
You're buying for a child or teenager and want a mattress that will still support them properly in five years, you're a single adult in a compact room, student flat or first rental where 90cm is all the floor plan allows, or you're setting up a spare room that doubles as an office and needs the smallest full-length bed available.
Consider another size if...
Two of you will share the bed regularly, or a solo adult sleeper simply wants more room to spread out. The UK small double is 30cm wider than the UK single and we'd recommend it instead where the room allows.
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Will the Simba Hybrid UK single fit a bunk bed or mid sleeper?
The footprint is the standard 90 x 190cm, so it will fit the platform of most UK bunk, cabin and mid sleeper frames. Depth is the thing to check: at 25cm this is thicker than many children's mattresses, and safety guidance on raised beds requires the guard rail to sit well above the mattress surface. Measure your frame before buying.
Is the Simba Hybrid single good for a child or teenager?
Yes, with one caveat. The medium-firm feel and zoned base suit growing bodies, and the graphite infused foam helps warm sleepers, so it should last well into the teenage years. Tom's Guide noted lighter weight sleepers may find it a little too firm, so a very young or particularly light child might prefer something softer.
How big is the Simba Hybrid in a UK single?
It measures 90 x 190cm, or 3ft x 6ft 3in, with a depth of 25cm. That is the standard UK one-person size, so it fits normal single bed frames, and standard single sheets and a 135 x 200cm single duvet fit it. We suggest allowing a room of at least 2.1m x 2.8m.
Should I buy the UK single or size up to a small double?
For a child's room, a shared sibling room or anywhere floor space is the priority, the UK single is the practical choice. If an adult will sleep on it every night and the room can take it, the UK small double is 30cm wider than the UK single and gives a solo sleeper noticeably more room to move.
Where is the cheapest place to buy the Simba Hybrid single?
It changes. Retailers adjust their prices often, and the single is sometimes discounted on a different schedule to the larger sizes, so there is no permanently cheapest option. The prices shown on this page are updated as retailers change them, so compare the retailers listed here before you buy.