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.
- A couples' size that leaves the room usable: At 135cm wide, the UK double leaves space in a typical bedroom for a wardrobe and drawers, which a UK king often doesn't.
- Less partner disturbance on a shared width: With 67.5cm each for two people sharing, the pocketed microsprings moving independently means a restless partner is felt less across the bed.
- Cooler sleeping when there are two of you: Two bodies generate more heat than one, so the graphite-infused Simbatex® layer drawing warmth away matters more in this size.
- Room for bedside tables both sides: In a room of around 3m x 3m, a UK double usually still allows a table on each side, which a wider bed can rule out.
- Easy to dress and easy to move: Double bedding is stocked everywhere at every price, and the 23cm depth makes this size simpler to manoeuvre up narrow stairs than a bulkier hybrid.
This size suits you if...
You share the bed every night and want the classic couples' size that still leaves floor space, you're furnishing a first flat or second bedroom where the bed has to coexist with a wardrobe and drawers, or you're setting up a guest room that needs to sleep visiting couples comfortably without dominating the space.
Consider another size if...
You and your partner both like room to sprawl, or one of you is a restless sleeper who drifts across the bed. The UK king, at 15cm wider than the UK double, would suit you better if your room allows it.
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Is the Simba Hybrid Inter 1500 double big enough for two adults?
It gives two people sharing 67.5cm each, which is the long-standing UK standard for couples. The microsprings respond to each sleeper independently, so you're less likely to feel your partner turn over. If either of you sleeps spread out, the UK king offers 15cm more width.
What room size do I need for the Simba Inter 1500 in a UK double?
We suggest allowing at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. At that size you should still fit bedside tables on both sides plus a wardrobe, which is usually the point of choosing a UK double over a UK king.
Will the UK double fit up narrow stairs in an older house?
At 135 x 190cm and 23cm deep, it's a more manageable shape on turning staircases and tight landings than wider or taller mattresses. Simba doesn't publish specific access guidance for this size, so measure any tight turns before ordering, but the UK double is generally the easiest shared size to move.
Should I get this mattress in a double or a king?
Choose the UK double if your bedroom is close to our suggested 2.6m x 2.8m minimum, or if you want room left for other furniture. The UK king is 15cm wider and 10cm longer, so it earns consideration if you're both tall or share with a pet claiming a corner.
Where can I buy the Simba Inter 1500 in a UK double?
Availability shifts, so the best approach is to compare the retailers listed on this page. The prices shown here are updated as retailers change them, which means you're seeing current stock rather than a snapshot that may be out of date.