Mattress Online Memory Zone 3000 Pocket King Size Mattress
The Memory Zone 3000 Pocket is a hybrid mattress from Mattress Online, combining memory foam with 3000 pocket springs (2000 standard plus 1000 mini) in a 28cm deep design.
- Pressure relief for side sleepers
- Usable sleep space to the edge
- 100-night trial & 5-year guarantee
£484
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.
Mattress Online Memory Zone 3000 Pocket Mattress
More available sizes
Mattress details
Mattress
Mattress Online Memory Zone 3000 Pocket Mattress
Size
Firmness
Medium Soft
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Depth (cm)
28
Layers
3
Layer Details
Memory Foam
Memory foam cradles to your shape, which means a cushioned, contouring feel rather than a springy one. The plush layers mould to your body to encourage correct spinal alignment.
Pocket Springs
2000 standard pocket springs and 1000 mini pocket springs work independently of each other, which means weight is distributed evenly and movement transfers less across the mattress.
Foam Encapsulated Border
A foam wall around the springs firms up the edges. In practice, that means more usable sleep space and less of a roll-off feeling near the sides.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- 75cm each for two sharing: The UK king gives each of you 75cm, which means you can change position without negotiating for territory in the small hours.
- 7.5cm more each than a double: The UK king is 15cm wider than the UK double, so each sharer gains 7.5cm, a difference you notice every night rather than a spec-sheet nicety.
- Springs that keep movement local: The 2000 standard and 1000 mini pocket springs move independently, so if one of you leaves for an early shift the other is less likely to stir.
- Length for taller sleepers: At 200cm the UK king is 10cm longer than the UK double, welcome relief if one of you is approaching six foot and used to feet hanging off the end.
- Edges you can actually sleep on: The foam encapsulated border firms up the sides, so all 150cm of width is usable rather than a no-go zone you roll away from.
This size suits you if...
You share the bed every night and have outgrown a double, or one of you keeps waking the other with early alarms and restless turning. It also suits couples where one partner is tall, since the 200cm length removes that dangling-feet problem, and the 75cm each gives a side sleeper on this soft, cradling surface room to settle without drifting into the middle.
Consider another size if...
Your bedroom can't comfortably take a 150 x 200cm mattress, as we suggest allowing at least 2.7m x 2.9m. The UK double would suit you better, needing around 2.6m x 2.8m, and it keeps the same medium soft feel.
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 a UK king big enough for a couple on this mattress?
Comfortably, for most. You get 75cm each, and because the pocket springs work independently and memory foam absorbs movement, a partner shifting or getting up early is less disruptive than on a smaller, bouncier bed. Very restless sharers, or anyone used to a hotel-style spread, might still prefer the UK super king.
What room size do I need for the Memory Zone 3000 in a UK king?
We suggest at least 2.7m x 2.9m, with 3.2m x 3.2m feeling comfortable. That leaves walking space and room for bedside tables on both sides. New build master bedrooms can be tighter than they look once wardrobes go in, so measure the floor you'll actually have left, not the empty room.
Is the UK king long enough for a tall sleeper?
At 200cm it's 10cm longer than the UK double, which is often the real reason taller people upgrade. If you're around six foot, that extra length means your feet stay on the mattress rather than off the end, and the foam encapsulated border keeps the surface supportive right to the edges.
Should we choose the UK king or the UK super king?
The UK king is 30cm narrower than the UK super king, and both are the same length. The UK super king gives 90cm each rather than 75cm, but we suggest a room of at least 3m x 2.9m for it. If your bedroom is average sized, the UK king is the more practical pick.
Will one of us waking early disturb the other in this size?
Less than you'd expect. The 3000 pocket springs move independently and the memory foam soaks up motion rather than bouncing it across the bed, and with 75cm each in the UK king you're less likely to be lying close enough to feel it in the first place. It's a sensible pick for mismatched schedules.