Hypnos Cawthorne Luxury Mattress
The Hypnos Cawthorne Luxury is a 26cm deep pocket spring mattress with a medium feel, handcrafted in the UK and approved by the National Bed Federation.
- Natural fibres instead of foam
- Wool & cotton keep you cooler
- Use the full bed width
£488
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The Hypnos Cawthorne Luxury uses 1400 ReActive pocket springs, which means each spring moves independently to follow the shape of your body rather than pushing back as one unit. Above the springs sit natural fibre comfort layers including wool and cotton, blended with polyester to help move heat and moisture away from you overnight. It comes in eight sizes from a UK Single up to an Emperor, plus EU Double and EU King options.
Mattress specifications
Firmness
Medium
Type
Pocket Spring
Depth (cm)
26
Number of Layers
5
Trial Period (nights)
100
Warranty (years)
5
Price Range
£488 to £994
Best Sleeping Position(s)
Side Sleeping
Back 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 suits you if you want traditional pocket spring comfort with natural fibres rather than foam. The wool and cotton layers breathe well, which means it should feel cooler than memory foam if you tend to overheat at night. The outer rows of springs are firmer than the centre, designed to give edge to edge support so you can use the full width of the bed. It carries a 5 year guarantee, and it is a step up in price from budget sprung mattresses, but the handcrafted construction and NBF approval offer some reassurance for the money.
Key features & 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.
Best suited for?
Warm sleepers
Wool and cotton comfort layers breathe and wick moisture away, which means it should feel cooler overnight than a memory foam mattress would.
Couples
Firmer outer rows of springs give edge to edge support, which means both of you can use the full width of the bed.
Combination sleepers
Pocket springs that move independently follow your body as you turn, so changing position through the night should feel natural on the medium feel.
Eco-conscious buyers
The support pad is made from recycled materials and the comfort layers use natural fibres such as wool and cotton, rather than relying on foam.
If you like the slow, cradling sink of memory foam, this traditional sprung feel will not give you that. It is listed as medium, yet some owners find it firmer than expected, so lightweight side sleepers wanting a soft, pressure-relieving surface may find it a little unforgiving without a topper.
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 Luxury Mattress
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FAQ's
How firm is the Hypnos Cawthorne Luxury mattress?
It is rated medium, which suits most sleeping positions. That said, across owner reviews some people find it firmer than medium-firm in practice, so if you are light or sleep on your side, be prepared for it to feel a little firmer than the label suggests.
Does the Hypnos Cawthorne come with a trial period?
Mattress Online lists a 100-night trial with this mattress, but note this is the retailer's own offer rather than a Hypnos policy, and it requires you to buy a mattress protector from them. If you purchase elsewhere, check that retailer's returns terms before you buy.
What guarantee does the Hypnos Cawthorne Luxury have?
The Mattress Online listing states a 5 year guarantee. That is shorter than some brands offer, so if long cover matters to you, factor that into your decision.
How deep is the Hypnos Cawthorne Luxury mattress?
It is 26cm deep, so standard fitted sheets should fit without trouble. Inside are 1400 pocket springs topped with wool, cotton and polyester comfort layers, plus a dual density support pad made from recycled materials.
What sizes does the Hypnos Cawthorne Luxury come in?
Eight sizes: UK Single, Small Double, Double, King, Super King and Emperor, plus EU Double and EU King.
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