Firmness
Medium
Type
Pocket Spring
Depth (cm)
26
Number of Layers
5
Trial Period (nights)
100
Warranty (years)
5
Price Range
£565 to £1,125
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 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 at £565 for a single 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 & what's inside
- 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.
Who's it NOT for?
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.
Hypnos Cawthorne Luxury Mattress
Across 65 reviews on the mattressonline.co.uk product page it holds a 4.5 rating, with owners reporting comfortable, supportive sleep and relief from back pain. Some say it feels firmer than medium-firm, raise edge support concerns, or suggest adding a topper.
View all mattresses
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. Prices range from £565 to £1,125 depending on the size you choose.
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