Hypnos Jura King Size Mattress
The Hypnos Jura Mattress layers natural latex and at least five full fleeces of organic British lambswool over pocket springs, which means a natural, cushioned pillowtop feel without any memory foam.
- Natural latex & organic lambswool
- Pillowtop cushioning on top
- Handcrafted in the UK
£4,949
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Hypnos Jura Mattress
More available sizes
Mattress details
Mattress
Hypnos Jura Mattress
Size
Firmness
Construction
Latex
Natural
Pocket Spring
Wool
Depth (cm)
31
Layers
3
Layer Details
Natural latex
Two naturally supporting latex layers, used instead of memory foam. That means support from a natural material rather than a foam one.
Organic British lambswool
At least five full fleeces of organic British lambswool, whichever tension you choose. That gives you a natural, cushioned comfort layer.
ReActivePro 7-turn pocket springs
Hypnos' ReActivePro 7-turn pocket springs form the support base. Hypnos doesn't publish a spring count for this mattress.
Layer details from featherandblack.com product page, November 2026.
Key benefits
- More room each than a double: You each get 75cm of width compared with 67.5cm on a UK double, which means 7.5cm more space before you meet your partner in the night.
- Extra length for taller sleepers: At 200cm (6ft 6in) long, the UK king is 10cm longer than a UK double, so a taller partner can stretch out without their feet reaching the edge.
- Some distance on different schedules: If one of you is up hours before the other, the extra width gives a little more distance between you as they climb out in the dark.
- Space without a super king's room demands: The UK king is 30cm narrower than the UK super king, which means it fits rooms where a super king would leave you squeezing past the bed.
- Room to shift and prop: During pregnancy or recovery, the 150cm width leaves space for extra pillows on one side without pushing your partner towards the edge.
This size suits you if...
You share the bed every night and feel cramped on a UK double, or one of you is tall enough that 190cm leaves your feet hanging. It also suits couples whose bedtimes and alarms rarely line up, where a little more space between you means fewer disturbed nights.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m, or you mostly sleep alone. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Is the Hypnos Jura UK king big enough for two people?
For most couples, yes. The UK king measures 150 x 200cm, which gives each of you 75cm of width. That is a comfortable step up from a UK double, although if one of you sprawls or you share with a dog every night, the UK super king's 90cm each may suit you better.
Hypnos Jura UK king vs UK double: how much extra space do you get?
The UK king is 15cm wider and 10cm longer than the UK double. Shared between two, that works out at 7.5cm more each, since the UK double gives 67.5cm per person. The extra length is often the bigger change for a taller partner.
What size bedroom do I need for a Hypnos Jura UK king?
We suggest allowing at least 2.7m x 2.9m for a UK king. New build master bedrooms can feel tighter than their floor plan once wardrobes go in, so measure the space that is left after furniture, not the bare room.
Should I get the Hypnos Jura in a UK king or a UK super king?
The UK king is 30cm narrower than the UK super king but the same length, giving 15cm less each. If your room comfortably takes the UK super king, which we suggest needs at least 3m x 2.9m, and you want maximum separation, size up. Otherwise the UK king is a sensible middle ground.
Is the Hypnos Jura king size long enough if you're tall?
The UK king is 200cm long, or 6ft 6in, which is 10cm longer than a UK double. If length is your main concern, the UK king gives the same length as the UK super king, so you only need to size up if you also want more width.