Firmness
Firm
Type
Pocket Spring
Depth (cm)
28
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
10
Price Range
£738 to £1,788
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
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 & what's inside
- 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.
Who's it NOT for?
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.
Hypnos Marlow Ortho Deluxe Mattress
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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. Prices range from £738 to £1,788 depending on the size you choose.
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