Rest Assured Knowlton Latex Pocket 2000 Pillowtop Super King Mattress
The Rest Assured Knowlton Latex Pocket 2000 Pillowtop comes in UK Single, Double, King and Super King.
- Medium feel with a cushioned top
- Zoned support where you need it
- Hypoallergenic cover
£804.13
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.
Rest Assured Knowlton Latex Pocket 2000 Pillowtop Mattress
More available sizes
Mattress details
Mattress
Rest Assured Knowlton Latex Pocket 2000 Pillowtop Mattress
Size
Firmness
Medium
Construction
Pocket Spring
Latex
Depth (cm)
Layers
3
Layer Details
Pillow top
An extra layer of comfort across the surface, which gives the mattress a softer, more cushioned feel when you first lie down.
Latex comfort layer
A 2.5cm layer of natural latex sits below the pillow top. It adds a responsive, sink-in comfort between you and the springs.
Pocket springs
Individual springs are encased in cloth pockets and zoned to relieve pressure at key areas of the body, so the base supports different parts of you in different ways.
Layer details from mattressonline.co.uk and archerssleepcentre.co.uk product pages, October 2026.
Key benefits
- Room for a fidgety partner: You each get 90cm of width, so a partner who turns all night is further away and a little easier to sleep through.
- Space when the family piles in: When a child pads in at 3am, the UK super king leaves the adults some mattress of their own.
- A step up from the UK king: It is 30cm wider than the UK king at the same length, which works out as 15cm more each for two sharing.
- Suits dogs on the bed: If a large dog sleeps with you every night, the extra width means you are less likely to wake clinging to the edge.
- In proportion in a large bedroom: In a period property or a big master bedroom, a UK super king fills the space where a smaller bed can look lost.
This size suits you if...
You share with a partner whose tossing and turning wakes you, or children and a dog regularly end up in your bed, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is tighter than 3m x 2.9m, or your door and landing are awkward. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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 Knowlton UK super king big enough for two adults and a child?
For occasional visits, yes. Two adults get 90cm each on the UK super king, so a small child can squeeze in without anyone being pushed to the edge. If a child sleeps in with you every night, expect things to feel full rather than roomy, although you still get more space than any other size in this range.
How much wider is the Rest Assured Knowlton super king than the king?
The UK super king is 30cm wider than the UK king, and both are 200cm long. For two people sharing, that works out as 15cm more each: 90cm on the UK super king against 75cm on the UK king. You'll notice the difference in width, not in legroom.
Should I choose the Knowlton UK super king or UK king for a restless partner?
If a partner's movement is what keeps you awake, the UK super king is the better bet, as extra distance helps where no comfort layer can. Choose the UK king if your room is tight: we suggest at least 2.7m x 2.9m for the UK king, compared with 3m x 2.9m for the UK super king.
Will a Knowlton super king fit in a loft conversion bedroom?
It can, but floor area alone won't tell you. Allow at least 3m x 2.9m, and around 3.5m x 3.2m if you want it to feel comfortable. In a loft conversion the sloping ceiling usually decides which wall the headboard can go against, so measure the full-height section, not the whole floor.
What should I check before ordering the Knowlton in a UK super king?
Measure how far your bedroom door swings open, then walk the route from the front door and look for tight landing turns. Budget for new bedding too: you'll need super king sheets and a 260 x 220cm duvet. For current prices, compare the retailers listed on this page, which update as they change.