Hypnos Cawthorne Luxury Mattress
Mattress
Hypnos Cawthorne Luxury Mattress
Size
Firmness
Medium
Construction
Depth (cm)
26
Layers
5
Layer Details
- Cover. A soft to touch Belgian damask cover.
- Comfort layer. A blended layer of wool and polyester fibres, plush for comfort. The blend has breathable properties that increase airflow through the mattress.
- Comfort layer. A blend of rebound cotton and polyester that wicks moisture away from your body. This helps the sleep surface feel fresher.
- Support pad. A durable eOlus dual density pad made from recycled materials, with a firmer feel. It helps distribute your weight evenly across the springs below.
- Support system. 1400 ReActive pocket springs, with firmer outer rows to create edge to edge support.
Layer details from mattressonline.co.uk product page, September 2026.
- A shared size for ordinary rooms: At 135cm wide it fits comfortably in rooms where a UK king would leave you squeezing past the footboard, and we suggest at least 2.6m x 2.8m.
- Firmer edges mean usable width: The outer rows of the 1400 ReActive pocket springs are firmer than the centre, so both of you can sleep close to the edge without rolling off.
- Springs that move independently: Each pocket spring responds to the person above it, which means one of you turning over is less likely to disturb the other in a shared bed.
- Natural fibres for two warm bodies: Two sleepers generate more heat than one, and the wool and cotton layers help move that warmth and moisture away overnight.
- The easiest size to dress: Double sheets and 200 x 200cm duvets are stocked everywhere at every price, useful if you're furnishing a room from scratch.
This size suits you if...
You share the bed every night and want the traditional couples' size that leaves room for wardrobes, drawers and bedside tables on both sides. Or you sleep alone and want space to stretch out, perhaps with a dog or cat claiming their usual corner. It also makes a sensible guest room choice, since visiting couples can share it and single guests get plenty of room.
Consider another size if...
You and your partner both like space and your room measures at least 2.7m x 2.9m. The UK king is 15cm wider and 10cm longer than the UK double, and we'd recommend it if either of you is tall or a restless sleeper.
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Is the Hypnos Cawthorne UK double wide enough for two adults?
It gives 67.5cm each for two people sharing, which most couples find workable rather than generous. The firmer outer spring rows help here: edge to edge support means you can sleep right up to the side without the mattress giving way, so the full 135cm width is genuinely usable.
Will the Hypnos Cawthorne UK double fit a smaller bedroom with bedside tables both sides?
Usually, yes. We suggest allowing at least 2.6m x 2.8m for a UK double, with around 3m x 3m the comfortable norm. That larger figure gives you a table on each side plus walking room, which is exactly why this size remains the default for typical UK master bedrooms.
Should I get the Hypnos Cawthorne in a UK double or size up to the UK king?
The UK double is 15cm narrower and 10cm shorter than the UK king. If either of you is over six feet or you both spread out in the night, the UK king is worth it, but it needs a room of at least 2.7m x 2.9m. In a tighter room, the UK double is the sensible call.
Is the UK double a good guest room size for this mattress?
Yes, it's arguably the ideal guest size: visiting couples can share it, single guests get plenty of room, and the medium feel of the Cawthorne sits in the middle ground most guests will get on with. Just check the room clears our suggested 2.6m x 2.8m minimum once the wardrobe is in.
Does a UK double Hypnos Cawthorne make sense for one person?
If your room allows it, absolutely. You get 45cm more width than the UK single at the same length, which is a real difference if you shift position a lot or share with a pet who claims a corner. Solo sleepers on a tighter budget or in a box room may prefer the UK single.