Jay-Be 1000 e-Pocket TRUECORE Eco-Friendly Mattress
Mattress
Jay-Be 1000 e-Pocket TRUECORE Eco-Friendly Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
21
Layers
4
Layer Details
- Knitted cover. A soft knitted cover that adds a cosy, slightly warm surface feel. The knit structure is designed to let air pass through, which helps the mattress breathe overnight.
- Soft White Fibres. Soft synthetic e-Fibre fillings that give the top of the mattress its cushioned feel. They're designed to be resilient, holding their shape rather than flattening quickly.
- 3D spacer. A spacer layer that improves airflow through the mattress. In practice, that means less heat building up around you as you sleep.
- Pocket Springs. Springs sit in individual cloth pockets, so each one responds to your body independently. That gives more tailored support along your spine and reduces the ripple effect when someone else moves.
Layer details from mattressonline.co.uk product page, September 2026.
- 75cm each for two people sharing: You each get 75cm of width, so an elbow-to-elbow double starts to feel like separate territory again.
- Pocket springs at their best in a wider bed: Each spring moves independently, and across 150cm of width there is more mattress between you, so an early alarm on one side travels less to the other.
- 200cm of length for taller sleepers: The UK king is 10cm longer than the UK double, which means anyone approaching 6ft stops sleeping diagonally or waking with cold feet off the end.
- Breathable build across a bigger surface: The all-fibre fillings and 3D spacer layer keep air moving, useful when two warm bodies share one mattress every night.
- A shared-bed upgrade at a budget-friendly level: King sizes usually carry a real price jump, but this mattress sits at the affordable end of pocket sprung options, so upgrading costs less than you might expect.
This size suits you if...
You share the bed every night and have outgrown the squeeze of a UK double, one of you gets up hours before the other and the movement wakes you, or someone in the bed is approaching 6ft and needs the extra 10cm of length. It also makes sense if pillows, a restless sleeper or a dog routinely eat into your half of the mattress.
Consider another size if...
Your bedroom is under our suggested 2.7m x 2.9m minimum, or you sleep alone and don't need the width. We'd recommend the UK double instead, which fits rooms from around 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.
Is the Jay-Be 1000 e-Pocket UK king big enough for two adults?
Yes, comfortably for most couples. At 150 x 200cm it gives 75cm each for two people sharing, and the pocket springs respond to each sleeper independently, so you are less likely to feel your partner shift or get up. If one of you is a particularly sprawling sleeper, the extra width over a UK double is where you'll notice the difference.
What room size do I need for a UK king mattress like this?
We suggest at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m feeling properly comfortable. That is our own guidance rather than Jay-Be's. New build master bedrooms can be tighter than they first appear once wardrobes go in, so measure the usable floor space, including door swing, before committing.
How much bigger is the UK king than the double in the Jay-Be 1000 e-Pocket?
The UK king is 15cm wider and 10cm longer than the UK double. The width is what couples feel night to night, while the length matters most if either of you is approaching 6ft. Both sizes have the same 21cm depth, 1,000 pocket springs and fibre fillings, so you are only paying for space, never a different build.
Is the Jay-Be 1000 e-Pocket king good for couples on different schedules?
It's a sensible pick. The pocket springs sit in individual cloth pockets and compress independently, and the UK king's 150cm width puts more mattress between you, so one person slipping out at 5am is less likely to disturb the other. It won't match the motion isolation of dense foam hybrids, but for a springy, breathable mattress it does well.
Where can I buy the Jay-Be 1000 e-Pocket in a UK king?
Compare the retailers listed on this page. The prices shown here are live and updated as retailers change them, so it's worth checking back if you're not buying today. Make sure the listing specifies the UK king at 150 x 200cm, as this mattress also comes in single, small double and double sizes.