Simba Hybrid Inter 1500 Pocket Mattress
Mattress
Simba Hybrid Inter 1500 Pocket Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
23
Layers
5
Layer Details
- Knitted top cover. A 500g knitted cover with a zip-off, washable sleep surface. That means you can keep the top of the mattress genuinely fresh rather than just airing it.
- Aerocoil® microsprings. Up to 1,500 conical 25mm pocket springs made from titanium alloy, manufactured in Leeds and enclosed in a polypropylene pocket. Each spring moves independently, which means the mattress responds to your shape rather than tilting you towards a partner.
- Simbatex® foam comfort layer. Open-structure CertiPUR® foam infused with graphite to dissipate heat. In practice, this means warmth is drawn away from you rather than building up under your back.
- CertiPUR® foam comfort layer. A further CertiPUR® foam layer for cushioning. CertiPUR® certification means the foam contains no heavy metals such as mercury or lead.
- Support base. A seven-zoned CertiPUR® foam base. The zoning gives firmer support under heavier areas like your hips and a slightly softer feel at your shoulders.
Layer details from simbasleep.com product page, September 2026.
- Fits where space is tight: At 90cm wide it leaves room for a desk, wardrobe and floor space in a compact bedroom, and we suggest allowing at least 2.1m x 2.8m.
- Grown-up support for growing sleepers: The seven-zoned base gives firmer support under the hips, which means a teenager gets the same considered support an adult would, at the standard children's bed size.
- Washable cover for kids and guests: The zip-off top cover goes in the wash, useful for a child's bed or a guest mattress that sits unused between visits.
- Suits raised frames: At 23cm deep it sits lower than many hybrids, which helps on bunk, cabin and mid-sleeper frames where a tall mattress can breach the safety rail.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm single duvet fit, and both are the cheapest and most widely stocked bedding of any UK size.
This size suits you if...
You're buying for a child or teenager moving up from a first bed, you sleep alone in a compact room, loft conversion or student flat, or you're kitting out a spare room where the bed shares space with a desk. The medium-firm feel suits a sleeper who wants support rather than sink, at the smallest standard adult size.
Consider another size if...
You're an adult who spreads out at night, or the room can take something wider. The UK small double is 30cm wider at the same length, and we'd recommend it instead for a solo adult with the space.
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Will the UK single Simba Hybrid Inter 1500 fit a bunk bed?
In most cases, yes. The UK single is the standard bunk and mid-sleeper size at 90 x 190cm, and this mattress is 23cm deep, shallower than many hybrids. Do check your frame's maximum mattress depth before buying, as upper bunks need the safety rail to sit well above the mattress surface.
Is a UK single big enough for an adult?
For one adult, yes, provided you don't sprawl. At 90cm wide it's the standard UK one-person size and works well in student rooms, first flats and spare rooms. If you're a restless sleeper or simply used to more width, the UK small double of this mattress gives you 30cm more at the same length.
What room size do I need for a single Simba Hybrid Inter 1500?
We suggest allowing at least 2.1m x 2.8m of floor space. That leaves room to walk round the bed and open drawers or a wardrobe. In a child's room the 3ft width is the real advantage, as it leaves space for toy storage and a desk that a wider mattress would swallow.
How much smaller is the UK single than the UK double?
The UK single is 45cm narrower than the UK double, and the two are the same length at 190cm. That 45cm matters in a spare room that doubles as an office, or where two beds need to fit with a walkway between them, but it's a squeeze for two sleepers.
Can two UK singles work instead of one bigger bed?
Yes, and it's a sensible setup for siblings sharing a room or a guest room that needs to sleep two visitors separately. Each Simba Hybrid Inter 1500 has independent Aerocoil® microsprings, so each sleeper gets their own support, and single bedding is cheap to buy in pairs. Just allow walkway space between the frames.