Jay-Be Ryze Sprung Quilted e-pocket 800 Mattress in a Box
Mattress
Jay-Be Ryze Sprung Quilted e-pocket 800 Mattress in a Box
Size
Firmness
Construction
Depth (cm)
23
Layers
4
Layer Details
- Advance e-Fibre™. An extra-soft, deep-quilted top layer of Advance e-Fibre, which means a luxurious surface feel the moment you lie down. It also wicks moisture away to help keep the mattress fresh and regulate temperature.
- Breathable comfort layers. Open-cell comfort layers let air circulate freely through the mattress. In practice that means a fresher, more ambient sleep environment rather than trapped heat.
- 3D Mesh ventilated border. The border itself is made from ventilated 3D mesh, which gives warm air an escape route around the sides. It's a small detail that adds to the mattress's overall breathability.
- Deep Pocket Sprung core. 800 individual pocket springs adapt to your body's contours for tailored support. Because each spring moves independently, motion transfer is reduced, so you're less likely to be disturbed by a restless partner.
Layer details from jaybe.com product page, September 2026.
- Fits raised frames: At 23cm deep, it's slim enough for most bunk beds, cabin beds and mid sleepers, where a taller mattress can sit above the safety rail.
- Foam-free for warm little sleepers: Children often run hot at night, and the breathable, foam-free layers give heat routes out rather than trapping it around them.
- Leaves floor space free: At 3ft wide, the UK single leaves room for a desk, wardrobe and toy storage even in a small child's bedroom.
- Easy to manoeuvre: It arrives rolled in a box, so carrying it up to a loft conversion or into a student room is a one-person job.
- Support that lasts through growth spurts: 800 individual pocket springs adapt to the sleeper's shape, so it supports a light child now and a heavier teenager later.
This size suits you if...
You're buying for a child or teenager and want a breathable, foam-free bed that will still support them in five years; you need a mattress for a bunk, cabin or mid-sleeper frame where depth is limited; or you're kitting out a spare room or student flat where the frame is a UK single and space is tight.
Consider another size if...
You're an adult sleeping in this bed every night and find 90cm of width restrictive. We'd recommend the UK double instead: it's 45cm wider, the same length, and we suggest a room of at least 2.6m x 2.8m for it.
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.
What size is the Jay-Be Ryze e-pocket 800 UK single?
The UK single measures 90 x 190cm, which is 3ft x 6ft 3in. That's the standard UK one-person size, so it fits any standard single bed frame, divan or slatted base, and standard single sheets and duvets fit without adjustment.
Will the Jay-Be Ryze UK single fit a bunk or mid sleeper frame?
In most cases, yes. The mattress is 23cm deep, slimmer than many hybrids, which matters on raised frames where the mattress must sit below the safety rail. Check your frame's maximum mattress depth before buying, as some bunk beds specify a lower limit, but this is one of the better-suited hybrids for the job.
How much room does a UK single Jay-Be Ryze need?
We suggest allowing at least 2.1m x 2.8m of floor space, which is our own guidance rather than the manufacturer's. That leaves enough walkway to make the bed and open drawers. In a child's room competing with a desk and wardrobe, or under the slope of a loft conversion, the 90cm width is the main reason to choose this size.
Is the Jay-Be Ryze UK single big enough for an adult?
For a guest room, spare room or student flat, yes: 90cm is comfortable for one person for regular solo use too. If it's your permanent everyday bed and you like to spread out, the UK double gives you 45cm more width at the same length, and we suggest a room of at least 2.6m x 2.8m for it.
Can I put two Jay-Be Ryze UK singles in a guest room?
Two UK singles side by side take up 180cm of width plus a walkway between them, so measure carefully first. It's a flexible setup for a guest room, letting friends, siblings or couples use the same space, and because each mattress has its own 800 pocket springs, movement on one bed won't carry to the other.