Hypnos Cawthorne Deluxe Mattress
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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.
- The classic couples' footprint: At 135 x 190cm the UK double gives 67.5cm each for two people sharing, enough for most couples without dominating an average bedroom.
- Independent springs matter more when sharing: The 1000 ReActive pocket springs move independently, which means your partner turning over disturbs you less than a connected spring unit would.
- Cooler for two: Two bodies generate more heat than one, and the breathable Solotex fibre layer helps draw that warmth away rather than trapping it between you.
- Room left for furniture: In a room around our suggested 2.6m x 2.8m minimum, a UK double still leaves space for bedside tables on both sides and a wardrobe.
- Easy to dress: Double sheets and 200 x 200cm duvets are sold everywhere at every price point, handy if you're kitting out a bedroom from scratch.
This size suits you if...
You're a couple in a typical UK bedroom and want space to share without the bed swallowing the room, or you sleep alone and like room to stretch, perhaps with a dog or cat claiming a corner. It also makes a sensible guest room bed, since visiting couples can share it comfortably and it fits alongside a wardrobe and drawers in a smaller second bedroom.
Consider another size if...
You and your partner both like to spread out, or one of you is tall, since the UK double is 15cm narrower and 10cm shorter than the UK king. We'd recommend the Hypnos Cawthorne Deluxe in a UK king instead, allowing at least 2.7m x 2.9m of room.
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What size is the Hypnos Cawthorne Deluxe double mattress?
The UK double measures 135 x 190cm, which is 4ft 6in x 6ft 3in. That works out at 67.5cm each for two people sharing. It's the standard British couples' size, so double bed frames, sheets and 200 x 200cm duvets all fit without any hunting around for unusual dimensions.
Is the Hypnos Cawthorne Deluxe double big enough for two?
For most couples, yes. Two sharers get 67.5cm of width each, and the 1000 independent pocket springs help limit the ripple when one of you moves. Restless sleepers, or anyone over about 6ft 3in, may prefer the UK king, which is 15cm wider and 10cm longer.
What room size do I need for the Hypnos Cawthorne Deluxe in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That leaves room to walk around the bed and, in most rooms, keep bedside tables on both sides. This is our own guidance rather than the manufacturer's, so measure your room before ordering.
Will a double Hypnos Cawthorne Deluxe fit up the stairs?
Pocket spring mattresses don't arrive rolled the way boxed foam does, so the 135 x 190cm mattress comes at full size. If you live in an older terrace with a turning staircase or a new build with a tight landing, measure the awkward point first and check the retailer's delivery guidance.
Should a solo sleeper choose the double or the UK small double?
If your room allows it, the UK double is the more comfortable solo choice: it's 15cm wider than the UK small double at the same length, welcome if a pet shares the bed. In a compact first flat or second bedroom, the UK small double saves space, allowing at least 2.4m x 2.8m.