Hypnos Cawthorne Deluxe 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
£424
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Hypnos describes the Cawthorne Deluxe's feel as medium, which suits back sleepers and most side sleepers, although anyone wanting a properly firm surface should look elsewhere. The fillings are entirely fibre-based rather than foam, which means a springier, more breathable feel than memory foam offers. It's handcrafted in the UK, covered by a 5-year guarantee, and comes in sizes from a UK Single up to an Emperor.
Mattress specifications
Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
25
Number of Layers
5
Trial Period (nights)
100
Warranty (years)
5
Price Range
£424 to £908
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
BS 7177
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
This mattress makes sense if you want traditional pocket spring comfort without foam. The Solotex fibre layer increases airflow through the mattress, which means heat and moisture are drawn away rather than trapped, so hot sleepers should stay cooler than on a foam-topped bed. The eOlus layer adds a slightly firmer cushioning and is made from recycled material, a small plus if sustainability matters to you. Hypnos is a National Bed Federation Approved Brand, and the mattress is finished in a Belgian damask cover. It sits at an accessible price for the brand, and Mattress Online lists a 100-night trial if you buy there, which gives you a full season to be sure.
Key features & 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.
Best suited for?
Back sleepers
The medium feel from the fibre layers over the pocket springs gives a supportive but cushioned surface, which suits lying flat on your back.
Side sleepers
Soft White Fibres and a plush Solotex layer sit on top of the springs, which means most side sleepers get a cushioned feel at the shoulder and hip.
Warm sleepers
The Solotex fibre layer increases airflow and draws heat and moisture away, so you should stay cooler than on a foam-topped bed.
Eco-conscious buyers
The eOlus fibre layer is made from recycled material, which is a small sustainability plus in a mattress that uses fibre fillings instead of foam.
Couples
The 1000 ReActive pocket springs sit in individual fabric pockets and move independently, which means they respond to each sleeper's movement separately.
If you prefer the slow, cradling sink of memory foam, this all-fibre and spring build will feel too bouncy. Hypnos rates it medium, so sleepers who need a genuinely firm surface, or heavier sleepers wanting a higher spring count for deeper support, may find it a little soft.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Hypnos Cawthorne Deluxe Mattress
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FAQ's
How firm is the Hypnos Cawthorne Deluxe mattress?
Hypnos describes it as medium, which means a balanced feel rather than a hard sleep surface. Owner reviews mention a balanced firmness suiting various sleeping positions, though some people needed a short adjustment period. If you sleep on your side or back, medium is usually a comfortable fit.
Does the Hypnos Cawthorne Deluxe come with a trial period?
Mattress Online lists a 100-night trial with this mattress. That trial is the retailer's own offer rather than a Hypnos policy, so if you buy elsewhere, check that seller's terms before ordering.
What is the guarantee on the Hypnos Cawthorne Deluxe?
It comes with a 5-year guarantee, which appears in the product specification as the manufacturer's guarantee. Keep your proof of purchase, and check the guarantee terms with your retailer at the point of sale.
Is the Hypnos Cawthorne Deluxe good for hot sleepers?
It should be a reasonable choice. The Solotex fibre layer is highly breathable and increases airflow through the mattress to dispel heat and moisture, and the fibre-and-spring construction avoids the heat retention foam can bring.
What sizes does the Hypnos Cawthorne Deluxe come in?
It's available in UK Single, Small Double, Double, King, Super King and Emperor, plus EU Double and EU King.
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