Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
29
Number of Layers
3
Trial Period (nights)
100
Warranty (years)
10
Price Range
£1,058 to £2,134
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.
If you sleep warm, this is the standout reason to shortlist the Winslow. The eight wool fleeces regulate body temperature, which means fewer sweaty wake-ups than you would get from a synthetic foam surface, and the wool is traced back to its origins through Hypnos' partnership with Red Tractor. The 1,200 pocket springs respond to each sleeper individually, so a restless partner is less likely to disturb you, and Triple Edge Protection adds three rows of firmer springs plus rod edging around the perimeter, which means you can sit or sleep right at the edge without it sagging. Sizes run from UK Single up to Emperor, with EU sizes available too.
Key Features & what's inside
- Sleep surface. A soft cotton sleep surface sits at the top. Cotton is naturally breathable, which means the layer closest to your skin stays comfortable rather than clammy.
- Wool fillings. Beneath the cotton sit eight fleeces of wool that regulate body temperature through the night, so you feel warm in winter and cooler in summer. The wool is sustainably sourced and traceable to its origins through Hypnos' partner Red Tractor.
- Support system. The base is 1,200 ReActivePro 6-turn pocket springs, which respond to your weight and position to relieve built-up pressure. Triple Edge Protection adds three rows of firmer springs and rod edging around the spring unit, which means a firmer, more usable edge.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
If you love the slow, cradling sink of memory foam, this traditional pocket spring feel will seem too springy. Lightweight side sleepers may also find the medium to firm tension a little unyielding on hips and shoulders. And if natural wool smells bother you, one owner did report a lingering animal scent.
Hypnos Winslow Luxury Wool Mattress
Is the Hypnos Winslow Luxury Wool mattress firm or soft?
Hypnos rates it medium to firm, so it offers solid support with a softer cotton and wool surface. It suits most back and combination sleepers, although lightweight side sleepers may find it slightly too firm for comfortable pressure relief at the shoulders.
Does the Hypnos Winslow come with a trial period?
Mattress Online lists a 100-night trial on this mattress, with an exchange available after 30 nights if you're unsatisfied. The trial requires buying a mattress protector from MattressOnline, and these are the retailer's own terms, so check conditions wherever you buy.
How long is the guarantee on the Hypnos Winslow mattress?
Mattress Online lists a 10-year guarantee on this mattress. That is a reassuring span for a natural-fill pocket spring bed, though as it appears on a retailer listing rather than the brand's own site, confirm the guarantee terms with your chosen seller before ordering.
Is the Hypnos Winslow good for hot sleepers?
Yes, temperature regulation is its strongest suit. The eight wool fleeces and cotton sleep surface breathe far better than synthetic foams, and owner reviews mention reduced overheating compared with previous mattresses. If you regularly wake up too warm, this design directly addresses that.
What sizes does the Hypnos Winslow Luxury Wool come in?
It comes in UK Single, Small Double, Double, King, Super King and Emperor, plus EU Double and EU King. Prices range from £1,058 to £2,134 depending on the size you choose, and the mattress is 29cm deep.
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