Simba Hybrid Inter 1500 Pocket King Size Mattress
The Simba Hybrid Inter 1500 Pocket is a medium-firm hybrid, 23cm deep, that pairs up to 1,500 titanium alloy Aerocoil® microsprings with graphite-infused Simbatex® foam, which means you get a springy, responsive feel with heat drawn away from your body as you sleep.
- Medium-firm support without the sink
- Minimises partner disturbance
- 200-night trial & 10-year guarantee
£599
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Simba Hybrid Inter 1500 Pocket Mattress
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Mattress details
Mattress
Simba Hybrid Inter 1500 Pocket Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
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.
Key benefits
- 75cm each for couples: Two people sharing get 75cm of width each, which means you can change position without negotiating for territory.
- Less partner disturbance: The independent Aerocoil® microsprings absorb movement locally, so an early riser on one side is less likely to wake the other.
- Extra length for taller sleepers: At 200cm, or 6ft 6in, this size gives taller sleepers room to stretch out without their feet hanging off the end.
- Cooler sharing: Two bodies generate more heat than one, and the graphite-infused Simbatex® foam draws warmth away rather than letting it build between you.
- Fits most master bedrooms: We suggest a room of at least 2.7m x 2.9m, which most UK master bedrooms can manage, unlike the space a UK super king demands.
This size suits you if...
You share the bed every night and a double has started to feel cramped, or one of you keeps odd hours and you want the width and independent springs to soak up their comings and goings. It also suits couples where one partner is approaching six foot, since the 200cm length is a genuine step up from a standard double.
Consider another size if...
Your bedroom is smaller than our suggested minimum of 2.7m x 2.9m, or you sleep alone. In either case we'd recommend the UK double instead, which keeps most of the comfort in less floor space.
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FAQ's
Is the Simba Hybrid Inter 1500 in a UK king big enough for a couple?
Yes, for most couples. At 150cm wide it gives you 75cm of width each, noticeably more breathing room than a double. The Aerocoil® microsprings respond to pressure independently, so one person shifting or getting up disturbs the other less. Couples who share with a dog or a small child may still want to consider sizing up.
What room size do I need for a UK king Simba Hybrid Inter 1500?
We suggest a room of at least 2.7m x 2.9m, with around 3.2m x 3.2m feeling comfortable once you add bedside tables on both sides and wardrobe doors that need to open. In a new build master bedroom, measure with the furniture in place: rooms often feel smaller once everything is in.
Should I get the Simba Hybrid Inter 1500 in a UK king or a UK super king?
The UK king is 30cm narrower than the UK super king but fits far more bedrooms. If your room comfortably exceeds 3.2m wide and you want maximum personal space, the UK super king is the roomier option. For most couples upgrading from a double, the UK king is the practical middle ground.
Is this size long enough for a tall sleeper?
At 200cm, or 6ft 6in, it suits most people up to around six foot four. That extra length over a 190cm double is often the real reason taller sleepers upgrade, more than the width. If you or your partner is over six foot, this size solves the feet-off-the-end problem a double creates.
Where can I buy this mattress in a king size?
Availability changes, so the simplest route is to compare the retailers listed on this page. The prices shown here are updated as retailers change them, which matters because hybrid mattresses like this one are discounted often, and the best offer on the UK king can move between sellers from week to week.