Firmness
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)
Certifications
Assessed from Dormeo's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
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. At £259 to £419 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. Only three UK sizes are listed, so small double and super king shoppers will need to look elsewhere.
Key Features & what's inside
- 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.
Who's it NOT for?
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. Fans of a traditional metal-sprung bounce may find the foam feel takes adjusting to.
Dormeo Octasmart Premium Plus Mattress
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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, priced from £259 to £419 depending on size. 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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