Dormeo Octasmart Premium Plus Mattress
The Dormeo Octasmart Premium Plus is a medium-feel mattress that pairs a memory foam top layer with Dormeo's patented Octasprings, honeycomb-shaped foam springs that flex in three dimensions rather than just compressing downwards, which means the surface adapts to your shape without the dead, sink-in feel some all-foam mattresses have.
- Foam springs adapt to your contours
- Spring-like feel without coil noise
- 200-night trial & 20-year guarantee
£259
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The Dormeo Octasmart Premium Plus comes in UK Single, Double and King. Dormeo backs it with a 200-night trial and a 20-year guarantee, both notably generous, and delivery is free. It suits most sleepers who want contouring comfort at a mid-range price, although anyone who prefers a firm, traditional pocket-sprung feel may find it a little soft for their taste.
Mattress specifications
Firmness
Medium
Type
Pocket Spring
Depth (cm)
Number of Layers
2
Trial Period (nights)
200
Warranty (years)
20
Price Range
£259 to £419
Best Sleeping Position(s)
Side Sleeping
Back Sleeping
Combination Sleeping
Certifications
Assessed from Dormeo's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
The main draw here is the Octaspring design. These honeycomb foam springs move three-dimensionally, adapting to the contours of your body, which means pressure relief that feels more responsive than plain memory foam alone. The memory foam top layer adds that cradling, moulded-to-you sensation. It sits in affordable territory, and the reassurance is unusually strong: a 200-night trial gives you well over six months to decide, and the 20-year guarantee is longer than most brands offer. Delivery is free, with most orders arriving within 14 days, though Dormeo asks you to allow up to 28 days during busy periods.
Key features & layer details
Memory foam top layer
A pressure-relieving memory foam layer that moulds to your shape, cradling your body as you settle in. In practice this means less pressure on hips and shoulders, which side sleepers in particular tend to notice.
Octasprings
A layer of patented honeycomb-shaped Octasprings that move three-dimensionally, adapting to the contours of your body. Because they are made of foam rather than metal, you get spring-like responsiveness without the noise or firmness of a traditional coil.
Layer details from dormeo.co.uk product page, September 2026.
Best suited for?
Side sleepers
The memory foam top layer moulds to your shape, easing pressure on hips and shoulders, which is where side sleepers tend to notice it most.
Combination sleepers
Octasprings move three-dimensionally and respond as you shift, so changing position through the night feels easier than on plain memory foam alone.
Couples
Foam Octasprings replace metal coils, which means spring-like responsiveness without the noise, and Double and King sizes give two people room to settle.
Budget buyers
It sits in affordable territory, and the 200-night trial and 20-year guarantee add reassurance that the money is well spent.
If you prefer a firm mattress, the medium feel with a memory foam top may be softer than you'd like. It's also not the one if you need a small double or super king, as only Single, Double and King sizes are listed. If you prefer a traditional metal-sprung bounce, you may find the foam feel takes adjusting to.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Dormeo Octasmart Premium Plus Mattress
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FAQ's
How firm is the Dormeo Octasmart Premium Plus?
Dormeo rates it as medium. The memory foam top layer moulds to your shape while the Octasprings beneath adapt to your body's contours, so it feels contouring rather than firm. That suits most back and side sleepers, although lightweight sleepers may sink in less and find it slightly firmer than expected.
Does the Dormeo Octasmart Premium Plus come with a trial?
Yes. Dormeo offers a 200-night trial, which gives you more than six months to sleep on it at home before committing. That's a longer window than most brands offer, and useful here because memory foam can take a few weeks to adjust to.
How long is the guarantee on the Dormeo Octasmart Premium Plus?
Dormeo backs this mattress with a 20-year guarantee, which is unusually long and suggests real confidence in the Octaspring construction. As with any guarantee, check Dormeo's terms for what it covers before you buy.
What sizes does the Dormeo Octasmart Premium Plus come in?
It's available in UK Single, Double and King. Small double and super king aren't listed, so if you need either of those you'll need to consider a different model.
How long does delivery take for the Dormeo Octasmart Premium Plus?
Delivery is free. Dormeo says the majority of orders arrive within 14 days, though in periods of high demand you may need to allow up to 28 days. Worth factoring in if you're replacing a mattress on a tight timeline.
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