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.
- Real space for one: The UK small double is 30cm wider than the UK single, which means a solo sleeper can shift position freely without meeting the edge.
- Fits compact rooms: It's 15cm narrower than the UK double, often the difference between a door that clears the bed frame and one that doesn't in a box room or loft conversion.
- Independent springs matter at this width: On a 120cm mattress two occasional sharers lie close together, so the Aerocoil microsprings responding to each body separately genuinely helps.
- Cooling for a snug room: Compact bedrooms can run warm, and the graphite-infused Simbatex foam draws heat away rather than letting it build under you.
- Standard 4ft bedding: The small double is a standard UK size, so fitted sheets and frames are easy to find on the high street.
This size suits you if...
You sleep alone and have outgrown a UK single but your room can't take a full double, you're furnishing a guest room that hosts a couple a few weekends a year rather than nightly, or you're kitting out a rental's second bedroom and want the largest bed the space can sensibly hold.
Consider another size if...
You share the bed every night, because 120cm across two adults leaves little space each. We'd recommend the UK double instead, or the UK king if your room allows a 150cm width.
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Is the Simba Hybrid Inter 1500 small double big enough for a couple?
For occasional nights, yes. At 120cm wide it works for guests staying a few weekends a year, and the independent Aerocoil microsprings reduce the disturbance of a partner turning over so close beside you. For a couple sharing every night, the UK double gives a more comfortable amount of space each.
What room size do I need for a small double Simba Hybrid Inter 1500?
We suggest allowing at least 2.4m x 2.8m. That leaves room to walk round the bed and open drawers or a wardrobe. In a loft conversion or box room where a standard double would leave nowhere to stand, this size often fits with space to spare.
How much bigger is the small double than a single?
The UK small double is 30cm wider than the UK single, with the same 190cm length. For a teenager who has outgrown a single, or an adult who likes to spread out, that extra width is noticeable every night without demanding much more floor space.
Will my double bedding fit a small double mattress?
Fitted sheets won't: you need small double (4ft) sheets, as double ones will sag on a 120cm mattress. A standard double duvet works well though, draping generously over both sides, which is one reason this size feels comfortable for a solo sleeper.
Where can I buy the Simba Hybrid Inter 1500 in a small double?
Compare the retailers listed on this page. Availability and prices change regularly, so the table here is updated as retailers adjust them, which makes it the quickest way to check current stock and the best price for the UK small double specifically.