Hypnos Winslow Luxury Wool King Size Mattress
The Hypnos Winslow Luxury Wool is a pocket spring mattress with natural fillings, rated medium to firm, so it suits sleepers who like a supportive feel with a softer surface layer.
- Eight wool fleeces keep you cooler
- Minimises partner disturbance
- Sit or sleep at the edge
£1,835
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Hypnos Winslow Luxury Wool Mattress
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Mattress details
Mattress
Hypnos Winslow Luxury Wool Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Wool
Natural
Depth (cm)
29
Layers
3
Layer Details
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.
Key benefits
- Room to sleep apart, together: At 75cm each for two people sharing, you can settle into your own space rather than negotiating the middle ground every night.
- Movement stays on their side: The width pairs well with the individually responding pocket springs, which means a restless partner or an early alarm is felt less across the gap.
- Length for taller sleepers: The UK king is 10cm longer than the UK double, so anyone nudging six foot gets their feet on the mattress rather than off it.
- A usable edge across the full width: Triple Edge Protection runs firmer springs around the perimeter, so the outer inches of this 150cm width hold you rather than tipping you off.
- Wool comfort shared without overheating: Two bodies under one duvet generate heat, and the eight wool fleeces help keep both of you at a steady temperature through the night.
This size suits you if...
You share the bed every night and a double has started to feel like a negotiation, especially if one of you gets up hours before the other. It also suits couples where one partner is approaching six foot, since the 200cm length stops feet hanging off the end. And if the dog treats the bed as its own, the extra width absorbs that too.
Consider another size if...
Your bedroom can't take our suggested minimum of 2.7m x 2.9m for a UK king. In that case we'd recommend the UK double instead, which needs at least 2.6m x 2.8m and gives up only 15cm of width and 10cm of length.
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FAQ's
How big is the Hypnos Winslow in a UK king?
The UK king version measures 150 x 200cm, which is 5ft x 6ft 6in. For two people sharing, that works out at 75cm each. The 29cm depth is the same across every size, so factor that in when buying fitted sheets.
Is a UK king Hypnos Winslow big enough for a couple?
For most couples, yes. You get 75cm each for two people sharing, and the 1,200 pocket springs respond to each of you individually, so movement on one side transfers less to the other. If you both spread out or share with children or pets, the UK super king is 30cm wider.
What room size do I need for a king size Winslow?
We suggest at least 2.7m x 2.9m for a UK king, which leaves enough space to walk round the bed and open drawers. Be careful with new build master bedrooms: they can feel generous empty, then tight once wardrobes go in, so measure with the furniture in place.
Will the edges of the king size feel soft with two people using the full width?
No more than the middle does. Triple Edge Protection adds three rows of firmer springs plus rod edging around the perimeter, so both sleepers can use the outer edge of the 150cm width, or sit on it while getting dressed, without it giving way.
Is the UK king long enough for someone over six foot?
At 200cm, it's 10cm longer than the UK double, and that extra length is often the real reason taller sleepers upgrade. Someone a little over six foot should fit comfortably. Sizing up to the UK super king adds width only; both sizes are the same length.