Firmness
Medium Firm
Type
Hybrid
Depth (cm)
23
Number of Layers
5
Trial Period (nights)
200
Warranty (years)
10
Price Range
£549 to £899
Best Sleeping Position(s)
Certifications
Features CertiPUR® certified foams, ensuring no harmful chemicals.
Assessed from Simba's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
This mattress suits sleepers who want a supportive, medium-firm feel without the sink of an all-foam bed. The conical Aerocoil® microsprings, made in Leeds, respond to pressure independently, which means less motion transfer if you share your bed. The Simbatex® layer uses open-structure foam infused with graphite to dissipate heat, so it should feel cooler than standard memory foam. A zip-off, washable top cover is a practical touch for allergy sufferers or anyone who likes a genuinely clean sleep surface. Add the 200-night trial, free delivery to most of the UK and a 10-year guarantee, and there's plenty of room to change your mind. The foams are simpler than Simba's pricier models, but the essentials are here.
Key Features & what's inside
- 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.
Who's it NOT for?
If you prefer a soft, cradling feel, the medium-firm tension here may feel a little unyielding, particularly for lightweight side sleepers. At 23cm deep it's also shallower than some hybrids, so if you like a tall, hotel-style profile this probably isn't the one.
Simba Hybrid Inter 1500 Pocket Mattress
Across 173 reviews on simbasleep.com, owners rate it 4.8 out of 5, with themes of comfort, improved sleep quality and surprise at the value for money. The retailer feed from Mattress Online shows a more modest 4.1.
Is the Simba Hybrid Inter 1500 firm or soft?
Simba describes it as medium-firm. That suits most back and combination sleepers, although lightweight side sleepers may find it slightly too firm for comfortable pressure relief at the shoulder and hip.
Does the Simba Hybrid Inter 1500 come with a trial?
Yes. Simba offers a 200-night trial when you buy direct, with free returns during that period, so you can send it back if it doesn't suit you. There's also a 10-year guarantee.
Does the Simba Hybrid Inter 1500 sleep hot?
It's designed not to. The Simbatex® comfort layer uses open-structure foam infused with graphite to dissipate heat, and the pocket microsprings allow more airflow than a solid foam core. Hot sleepers should find it cooler than a typical all-foam mattress.
How deep is the Simba Hybrid Inter 1500 mattress?
It's 23cm deep. That's a fairly slim profile for a hybrid, so standard fitted sheets will fit easily, but it won't give you the tall, built-up look of deeper mattresses.
What sizes does the Simba Hybrid Inter 1500 come in?
Five UK sizes: Single, Small Double, Double, King and Super King, priced from £549 to £899. Delivery is free as standard to most of the UK, with seven-days-a-week delivery available.
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