Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
25
Number of Layers
5
Trial Period (nights)
100
Warranty (years)
5
Price Range
£404 to £838
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
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. At £404 to £838 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 & what's inside
- 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.
Who's it NOT for?
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.
Hypnos Cawthorne Deluxe Mattress
Across owner reviews on the mattressonline.co.uk product page, rated 4.7 from 61 reviews, customers report very comfortable sleep with a balanced firmness that suits various sleeping positions. Some noted an adjustment period to its firmness, though most found it supportive and good value.
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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. Prices run from £404 to £838 depending on the size you choose.
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