Firmness
Firm
Type
Pocket Spring
Depth (cm)
27
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
10
Price Range
£823 to £1,999
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 mattress suits you if you sleep on your back or front and want firm, orthopaedic-style support without heat build-up. The damask cover doesn't retain heat and the cotton layer wicks away moisture, so if you're a hot sleeper, that combination should help. It can be rotated and flipped for even wear, which many owners mention, and that's rarer than it used to be. Yes, £823 to £1,999 is a real spend, but you're getting handcrafted UK construction and eco-conscious Solotex fillings. Mattress Online, currently the sole listed retailer, offers a 10-year guarantee and a 100-night trial, though the trial requires buying a mattress protector from them.
Key Features & what's inside
- Damask cover. A finely woven, durable fabric that feels soft to the touch. It doesn't retain heat, which means it stays cooler against you through the night.
- Cotton. Breathable cotton fibres that wick away moisture. In practice that keeps you dry and cool rather than clammy.
- Solotex™. A filling engineered from recycled plastic, so it's an eco-friendlier choice. It's extremely durable and cuddles body contours for a slightly softer feel over the firm springs.
- Pocket Springs. 1,200 ReActivePro 6-turn pocket springs with tighter spring resistance. That means a more supportive surface that still adapts to your unique shape, weight and movement.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
This is a firm mattress, so lightweight side sleepers may find it presses uncomfortably on shoulders and hips rather than letting them sink in. If you prefer a plush, hugging feel, or want memory foam contouring, look elsewhere. It's also only listed with one retailer, so you can't shop around on price.
Hypnos Alcester Ortho Extra Mattress
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Is the Hypnos Alcester Ortho Extra a firm mattress?
Yes, it's rated firm. The 1,200 ReActivePro 6-turn pocket springs use tighter spring resistance for a more supportive surface, softened slightly by cotton and Solotex fillings. It suits back and front sleepers best, although lighter side sleepers may find it a little unforgiving.
Does the Hypnos Alcester Ortho Extra come with a trial and guarantee?
Mattress Online lists a 100-night trial and a 10-year guarantee. Both are the retailer's own offers rather than Hypnos manufacturer terms, and the trial requires you to buy a mattress protector from Mattress Online at the same time.
What sizes does the Hypnos Alcester Ortho Extra come in?
Eight sizes: UK Single, Small Double, Double, King, Super King and Emperor, plus EU Double and EU King. It's 27cm deep across all sizes, with prices ranging from £823 to £1,999 depending on the size you choose.
Can you flip the Hypnos Alcester Ortho Extra mattress?
Owner reviews on Mattress Online highlight that it can be rotated and flipped for even wear. That's a genuine plus for longevity, as regular turning helps the fillings settle evenly rather than developing dips where you sleep.
What delivery options does Mattress Online offer for this mattress?
Mattress Online offers free delivery to most locations, with next day delivery on weekdays, a weekday of your choice up to 60 days ahead, or weekend slots. Delivery to your front door includes a two-hour time slot. Room delivery costs £20 and old mattress recycling £35.
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