Hypnos Marlow Ortho Deluxe Mattress
The Hypnos Marlow Ortho Deluxe is a firm pocket spring mattress built around 1,200 of Hypnos' ReActive 7-turn springs, which means the surface adjusts to your body shape rather than pressing back uniformly.
- Firm support for back & front sleepers
- Wool helps stop you overheating
- Double-sided for a longer life
£758
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The Hypnos Marlow Ortho Deluxe has natural wool and cotton comfort layers above the springs, so it sleeps cooler than most synthetic-topped firm mattresses. At 28cm deep and double-sided, it's designed to be flipped regularly, which helps it wear evenly over the years. It comes in eight sizes, from a UK Single up to an Emperor. It comes with a 10-year guarantee, and Hypnos holds a Royal Warrant from His Majesty King Charles III.
Mattress specifications
Firmness
Firm
Type
Pocket Spring
Depth (cm)
28
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
10
Price Range
£758 to £1,724
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Certifications
BS 7177
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
This is a mattress for people who genuinely want firm support, not a medium dressed up in marketing language. The eOlus recycled fibre pad has a vertical structure that's firmer than normal fillings, which means noticeably solid support next to the spring unit while still cushioning pressure points. The wool is Responsible Wool Standard certified and temperature regulating, so hot sleepers get some relief despite the dense build. Yes, it needs flipping regularly, which is a chore with a 28cm mattress, but double-sided construction is increasingly rare and tends to reward you with a longer usable life. If you sleep on your back or front and like a properly supportive surface, this suits well.
Key features & layer details
Wool comfort layer
Sustainably sourced British wool that regulates temperature, which means you're less likely to overheat on a firm, dense mattress. Wool also handles moisture well, keeping the sleep surface feeling fresh.
Cotton comfort layer
Natural cotton fibres that wick away moisture and help regulate body temperature. Paired with the wool above, this gives a breathable natural top rather than a synthetic one.
eOlus™ recycled fibre pad
Made from recycled plastic bottles, with a vertical structure that's firmer than normal fillings. It sits next to the spring unit, adding support while soothing pressure points.
ReActive™ 7-turn pocket springs
Hypnos' own pocket springs, designed to actively respond to your body shape for full-body personalised support. A dual heating treatment gives the springs memory and helps them retain their height over time.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Back sleepers
The firm feel and the eOlus recycled fibre pad beside the springs give a solid, supportive surface that suits lying flat on your back.
Front sleepers
A firm, dense build with a vertical-structure fibre pad keeps your midsection from sinking in, which suits anyone who sleeps face down.
Warm sleepers
Natural wool and cotton comfort layers regulate temperature and wick away moisture, so the firm, dense build is less likely to leave you overheating.
Eco-conscious buyers
The wool is Responsible Wool Standard certified and the supportive pad is made from recycled plastic bottles, so natural and recycled materials sit throughout.
Heavier sleepers
Firm support from the eOlus pad and ReActive 7-turn pocket springs, which keep their height over time, should hold up well under extra weight.
Lightweight side sleepers should probably look elsewhere: a firm surface can push against shoulders and hips rather than letting them sink in. It's also not for anyone who wants a no-flip mattress, as this one is double-sided and needs turning regularly. If you like a soft, enveloping feel, this will disappoint.
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.
Hypnos Marlow Ortho Deluxe Mattress
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FAQ's
How firm is the Hypnos Marlow Ortho Deluxe mattress?
It's rated Firm, and owner feedback backs that up: some reviewers add a topper to soften it slightly. That firmness suits back and front sleepers who want solid support, although lightweight side sleepers may find it a little too unyielding.
Does the Hypnos Marlow Ortho Deluxe need turning?
Yes. It's double-sided and designed to be flipped regularly. That's a bit more effort than a no-turn mattress, but flippable designs tend to wear more evenly and last longer as a result.
Does the Hypnos Marlow Ortho Deluxe come with a trial period?
Mattress Online lists a 100-night trial with this mattress. That trial is the retailer's own offer rather than a Hypnos guarantee, so if you buy elsewhere, check that seller's terms before ordering.
How many springs does the Hypnos Marlow Ortho Deluxe have?
It has 1,200 of Hypnos' ReActive 7-turn pocket springs. Each spring moves independently, which means the mattress responds to your body shape and weight distribution rather than moving as one unit, useful if you share a bed.
What sizes does the Hypnos Marlow Ortho Deluxe come in?
Eight sizes: UK Single, Small Double, Double, King, Super King and Emperor, plus EU Double and EU King.
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