Jay Be Pure Anti-Allergy Sprung Mattress
Mattress
Jay Be Pure Anti-Allergy Sprung Mattress
Size
Firmness
Construction
Depth (cm)
21
Layers
4
Layer Details
- Sleep surface. A soft-knitted sleep surface treated with plant-based margosa and linseed oils, which is where the anti-allergy protection comes from. It sits directly against your bedding, so the treatment works where it matters.
- Comfort layer. Extra-soft Advance e-Fibre, deep-quilted for gentle cushioning. This gives the initial softness you feel when you first lie down.
- Comfort layers. Breathable, 100% foam-free open-structured comfort layers that allow air to circulate freely. If you tend to sleep hot, this is the layer doing the work to keep you cooler.
- Support core. A deep sprung core that distributes support evenly across the mattress. This is what keeps your spine aligned rather than letting you sink into a dip.
Layer details from jaybe.com product page, September 2026.
- Real space for two: At 75cm each for two people sharing, you can both change position without a nudge waking the other.
- Length for taller sleepers: The UK king is 10cm longer than the UK Double, which means feet stay on the mattress rather than hanging off the end.
- Airflow across a bigger surface: The foam-free Advance e-Fibre layers let air move through the mattress, so two warm bodies sharing shouldn't turn the bed into a heat trap.
- Anti-allergy where you both sleep: The plant-based margosa and linseed oil treatment covers the whole 150cm-wide sleep surface, useful when two people share the same bedding.
- Fits most master bedrooms: We suggest at least 2.7m x 2.9m, which most UK master bedrooms can manage, unlike the demands of a super king.
This size suits you if...
You share the bed every night and a double has started to feel cramped, especially if one of you gets up hours before the other and would rather slip out without a disturbance. It's also the size to pick if either partner is approaching six foot, since the extra 10cm of length over a double is the difference between comfortable and curled up.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m minimum, or wardrobes have eaten the floor space in a new build master. The UK double would suit you better, needing around 2.6m x 2.8m.
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How big is the Jay Be Pure Anti-Allergy mattress in a UK king?
It measures 150 x 200cm, or 5ft x 6ft 6in. For two people sharing, that gives 75cm each, noticeably more personal space than a double offers. The depth stays the same as every other size at 21cm, so it's the footprint you're paying for, and it takes standard UK king sheets.
Does the Jay Be Pure Anti-Allergy mattress come in a super king?
No. The UK king is the largest size this mattress is made in, so if you want the full 180cm width of a super king you'd need a different model. For most couples, though, the 75cm each that the UK king provides is a comfortable amount of space.
What room size do I need for a UK king Jay Be Pure?
We suggest at least 2.7m x 2.9m, with more feeling comfortable once you add bedside tables on both sides and space to walk around. That's our guidance rather than JAY-BE's. If your room falls short, the UK double needs around 2.6m x 2.8m and may be the wiser buy.
Is the UK king worth it over the double for this mattress?
The UK king is 15cm wider and 10cm longer than the UK Double. The width is what you feel night to night as a couple, and the length matters if either of you is tall. If you sleep alone or your room is tight, the UK double is the more sensible choice.
Is a UK king Jay Be Pure good for couples on different schedules?
The width helps. With 75cm each for two people sharing, one of you can get up early or read late without leaning across the other. It's a sprung mattress rather than foam, so it won't cradle movement the way memory foam does, but the extra space does most of the work.