Hypnos Cawthorne Deluxe Super King Mattress
The Hypnos Cawthorne Deluxe is a 25cm deep pocket spring mattress with 1000 ReActive springs, each held in its own fabric pocket so they move independently and respond to where your body needs support.
- Foam-free pocket spring comfort
- Breathable fibres keep you cooler
- Made with recycled fibres
£714
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Hypnos Cawthorne Deluxe Mattress
More available sizes
Mattress details
Mattress
Hypnos Cawthorne Deluxe Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Eco-Friendly
Depth (cm)
25
Layers
5
Layer Details
Soft White Fibres
Soft synthetic fillings sit at the top to create a cosy feel. They're durable and resilient, which means the surface should hold its shape rather than flattening quickly.
Solotex™ fibres
A plush, highly breathable layer that increases airflow through the mattress. This helps dispel heat and moisture, so the sleep surface feels fresher through the night.
eOlus™ fibre layer
Made from recycled material, this layer adds cushioning with a slightly firmer feel. It's there to keep you supported and comfortable all night.
Dual density polyester fibre pad
One side adds an extra touch of comfort for you, the other supports the spring unit. Together they help distribute your weight evenly across the mattress.
Pocket Springs (ReActive™)
1000 ReActive springs sit in individual fabric pockets and move independently. That means they respond to movement and target the areas of your body that need support.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- 90cm each for two sharing: Each of you gets 90cm of width, which means a partner who turns over all night is simply too far away to disturb you.
- Independent springs across a wide bed: The 1000 ReActive springs move in individual pockets, so movement on one side of this very wide surface barely carries to the other.
- Space for children and pets: If small children or a large dog treat your bed as theirs, the 180cm width means everyone still gets a usable share.
- Airflow where two bodies share: The Solotex fibre layer draws heat and moisture away, useful when two sleepers, and sometimes more, are warming the same mattress.
- 30cm wider than a UK king: The UK super king is 30cm wider than the UK king at the same length, a difference you notice every single night.
This size suits you if...
You share the bed every night and want the most space a standard UK size offers, your partner is restless enough that distance matters more than any comfort layer, or children and pets regularly join you and a UK king has started to feel crowded. Your bedroom should be at least 3m x 2.9m by our guidance, and a larger master or period property will carry it comfortably.
Consider another size if...
Your bedroom measures under 3m x 2.9m, or you sleep alone and the width would go unused. The UK king would suit you better: it is 30cm narrower at the same length, and we suggest at least 2.7m x 2.9m for it.
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FAQ's
Is the Hypnos Cawthorne Deluxe super king a good choice for a restless partner?
Yes, and size does most of the work. With 90cm of width each, movement on the far side of the bed is a long way from you, and the 1000 pocket springs respond independently rather than transferring motion across the surface. For genuinely disruptive sleepers, that combination of distance and isolated springs beats any comfort layer.
Will the Hypnos Cawthorne Deluxe super king fit in my bedroom?
We suggest a room of at least 3m x 2.9m for a UK super king, which leaves walking space around the 180 x 200cm mattress and room for doors and drawers to open. Measure the door swing and any landing turns too: at this size, getting the mattress into the room can be harder than fitting it once it's there.
Should I get the Hypnos Cawthorne Deluxe in a UK king or a UK super king?
The UK super king is 30cm wider than the UK king, and the two are the same length. If your room meets our suggested 3m x 2.9m minimum and you share the bed, the extra width is what you'll feel every night. If your room is closer to 2.7m x 2.9m, the UK king is the sensible pick.
Is a super king big enough for a family sharing with children?
It's the size we'd point you to for that. At 180cm wide, two adults and a visiting child can each keep a workable strip of mattress, and the pocket springs support each body individually rather than tipping everyone towards the heaviest sleeper. The medium firm, all-fibre feel is springy rather than sinking, which makes shuffling over easier.
How many people can sleep comfortably on a 180 x 200cm mattress?
It's built for two, with 90cm each, the same width per person as a UK single. In practice that allowance is generous enough that a child or a dog joining overnight doesn't squeeze anyone off the edge. The 200cm length also suits taller sleepers, with 10cm more legroom than a UK double offers.