Mattress Online HydroShield Comfort Mattress
The HydroShield Comfort is Mattress Online's own-brand foam mattress, available in UK Single, Double and King sizes.
- Water-resistant cover for kids' rooms
- Reflex foam top eases pressure
- 100-night trial & 10-year guarantee
£174
Get the lowest price we've found
The HydroShield Comfort pairs a 10cm layer of Ecofoam, made from 100% recycled foam, with 4cm of Reflex foam, which means a sustainable build with pressure relief where your hips and shoulders sink in. At 14cm deep it's slimmer than many mattresses, and the medium to firm feel suits back and front sleepers more than lightweight side sleepers. You get a 100-night trial and a 10-year guarantee, plus a water-resistant cover, all handcrafted in the UK.
Mattress specifications
Firmness
Medium Firm
Type
Foam
Depth (cm)
14
Number of Layers
2
Trial Period (nights)
100
Warranty (years)
10
Price Range
£174 to £295
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
BS 7177
Assessed from Mattress Online'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 price is the headline here: you're getting a UK-handcrafted foam mattress with a 100-night trial and a 10-year guarantee, terms usually reserved for pricier models. The recycled Ecofoam base is a genuine plus if sustainability matters to you, and the water-resistant cover offers reassurance for kids' rooms or guest beds. Yes, it's a slim 14cm and single-sided, so you can't flip it to even out wear, but at an affordable starting price that's a fair trade. Delivery to your front door is free within 2 to 3 weeks, it arrives rolled and vacuum packed, and room-of-choice delivery and old mattress removal are available for an extra charge.
Key features & layer details
Ecofoam
A 10cm layer made from 100% recycled foam, which means the bulk of the mattress does the supportive work while keeping materials out of landfill. It gives the mattress its medium to firm character.
Reflex Foam
A 4cm layer of Reflex foam sits above, adding pressure-relieving comfort where your body meets the mattress. It also adds durability, helpful in a single-sided design you can't flip.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Back sleepers
The medium to firm feel from the 10cm Ecofoam layer gives steady support under the hips, which suits lying flat on your back.
Front sleepers
A medium to firm surface keeps your hips from sinking too deeply, which helps front sleepers stay level, while the Reflex foam on top adds some comfort.
Eco-conscious buyers
The main 10cm layer is Ecofoam made from 100% recycled foam, so most of the mattress keeps materials out of landfill.
Budget buyers
It is described as affordable, yet it still comes with a 100-night trial and a 10-year guarantee, which are terms usually found on pricier models.
Guest rooms
The water-resistant cover gives some reassurance against spills in a spare bed, and the slim 14cm build suits an occasional-use room.
At 14cm deep with a medium to firm feel, this isn't the mattress for lightweight side sleepers who need a softer, deeper surface to cushion the shoulder. Heavier sleepers, or anyone used to a plush pillow-top, may also find it a little too shallow and firm for comfort.
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.
Mattress Online HydroShield Comfort Mattress
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FAQ's
How firm is the Mattress Online HydroShield Comfort mattress?
Mattress Online describes it as medium to firm. That suits most back and front sleepers, although lightweight side sleepers may find it a little too firm for pressure relief at the shoulder.
Does the HydroShield Comfort mattress come with a trial?
Yes, Mattress Online offers a 100-night trial, so you can sleep on it at home before committing. It's also backed by a 10-year guarantee.
How is the HydroShield Comfort mattress delivered?
It arrives rolled up and vacuum packed within 2 to 3 weeks. Delivery to your front door is free, while delivery to a room of your choice and old mattress removal cost extra.
Is the HydroShield Comfort mattress waterproof?
It has a water-resistant cover, which offers protection against spills and accidents, although the page doesn't detail it as a separate layer. It's a sensible pick for children's rooms or guest beds for that reason.
Can you flip the HydroShield Comfort mattress?
No, it's a single-sided design, so it isn't made to be flipped. The 4cm Reflex foam layer is there to add durability, but you should still rotate it regularly to even out wear.
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