Jay-Be Ryze Deep Quilted Sprung e-pocket King Size Mattress in a Box
The Jay-Be Ryze is a medium firmness sprung mattress in a box, available in four UK sizes from Single to King.
- Breathable fill for hot sleepers
- Recycled, vegan-friendly materials
- 10-year guarantee
£246.72
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Jay-Be Ryze Deep Quilted Sprung e-pocket Mattress in a Box
More available sizes
Mattress details
Mattress
Jay-Be Ryze Deep Quilted Sprung e-pocket Mattress in a Box
Size
Firmness
Medium
Construction
Foam
Pocket Spring
Rolled
Memory Foam
Eco-Friendly
Depth (cm)
21
Layers
3
Layer Details
Cover/Fabric
A deep-quilted knitted fabric that's OEKO-TEX certified, which means it has been tested and shown to be free from harmful chemicals. The quilting adds a soft, cushioned surface feel from the moment you lie down.
Comfort Layer
Extra-soft Advance e-Fibre with an open-cell structure that encourages airflow and helps moisture evaporate, so heat is less likely to build up around you. It's made from recycled PET bottles, with a minimum of 70% recycled content.
Support Core
A deep sprung core that provides evenly distributed support across the mattress. Springs respond to pressure more quickly than foam, giving a slightly bouncier, more traditional feel.
Layer details from jaybe.com product page, September 2026.
Key benefits
- Room to sleep apart, together: At 75cm each for two people sharing, you can both change position without negotiating for territory in the middle of the night.
- Extra length for taller sleepers: The UK king is 10cm longer than the UK double at 200cm, which means anyone approaching 6ft stops sleeping diagonally or dangling their feet.
- Cooler across a bigger surface: The foam-free e-Fibre comfort layer encourages airflow, so two people sharing generate less trapped heat than they would on a foam bed.
- Kinder on different schedules: With 15cm more width than the UK double, an early riser can slip out with less chance of waking the person still asleep.
- A springier feel at scale: The deep sprung core spreads support evenly across the full 150cm width, giving a responsive, traditional feel rather than a slow foam sink.
This size suits you if...
You share the bed every night and a double has started to feel like a compromise, one of you is out the door hours before the other and wants to leave without a fuss, or one of you is tall enough that the extra 10cm of length over a UK double matters. It also suits couples who run warm, since the foam-free build breathes better than most boxed mattresses.
Consider another size if...
Your bedroom is smaller than the 2.7m x 2.9m we suggest for a UK king, or you sleep alone. We'd recommend the UK double instead, which needs a slightly more forgiving 2.6m x 2.8m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Is the Jay-Be Ryze UK king big enough for a couple?
Yes, comfortably. At 150 x 200cm you each get 75cm of width, noticeably more than a UK double offers, so one of you shifting position or getting up early disturbs the other less. If a dog routinely claims a corner of your bed, that extra width is what stops someone sleeping on the edge.
What size room do I need for the Jay-Be Ryze king?
We suggest a room of at least 2.7m x 2.9m for a UK king, which leaves enough space to walk round the bed and open drawers. Measure carefully in a new build master bedroom, as fitted wardrobes can eat that margin quickly. If your room falls short, the UK double suits rooms from 2.6m x 2.8m.
How much bigger is the king Ryze than the double?
The UK king is 15cm wider and 10cm longer than the UK double, taking you from 135 x 190cm to 150 x 200cm. The width is what couples feel every night, while the length is the quiet win for anyone tall: the Ryze in a UK king runs to a full 200cm, or 6ft 6in.
Is the Jay-Be Ryze king long enough for someone over 6ft?
At 200cm, or 6ft 6in in old money, it gives a sleeper over 6ft genuine clearance at both ends, which the 190cm UK double sizes don't. If height is your main reason for upgrading rather than width, the length gain alone can justify the move from a UK double.
Where can I compare prices for the Jay-Be Ryze in a UK king?
Use the live price table on this page. The prices shown here are updated as retailers change them, so you're always seeing current UK king pricing rather than a snapshot, and you can check delivery details directly with whichever retailer you choose.