Available 
Hypnos Cawthorne Deluxe Mattress
from £489-£819.
£489-£819
Sizes tracked: Single, Small Double, Double, King Size, Super King
Hypnos Mattress
Hypnos Cawthorne Support Mattress review
Hypnos Cawthorne Support Mattress is a firm pocket-sprung shortlist option with cotton-led comfort, a 100-night trial and a 5-year guarantee.
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Last verified: 2026-08-03
Quick verdict
Hypnos Cawthorne Support Mattress looks like a sensible shortlist choice if you want a firm-feel mattress with pocket-sprung support and a more traditional comfort feel from cotton fillings. It starts at £549 and runs to £909 across five sizes, so it is not a budget pick, but the 100-night comfort trial and 5-year guarantee add practical reassurance. Check the latest price and availability on Mattress Online before deciding, especially if you are comparing it with lower-starting alternatives like the Hypnos Cawthorne Deluxe Mattress or the Sleepeezee Fusion Pro Mattress.
Available sizes and prices
Hypnos Cawthorne Support Mattress is listed with 5 size options from £504-£818. The visible sizes include Single, Small Double, Double, King Size, so use the table to compare the option that matches the exact size, colour, format or specification you want. Always confirm the final checkout price, delivery charge and stock status on the retailer page.
| Size | Firmness | Price | Stock | Last checked | Link |
|---|---|---|---|---|---|
| Single | Check retailer | £504 | In stock | 2026-08-03 | View |
| Small Double | Check retailer | £588 | In stock | 2026-08-03 | View |
| Double | Check retailer | £644 | In stock | 2026-08-03 | View |
| King Size | Check retailer | £718 | In stock | 2026-08-03 | View |
| Super King | Check retailer | £818 | In stock | 2026-08-03 | View |
Key product details
These are the retailer details worth checking first for Hypnos Cawthorne Support Mattress: Brand: Hypnos; Type: Mattress; Sizes tracked: Single, Small Double, Double, King Size, Super King; Price range: £504-£818. Treat them as a quick fact sheet, then use the retailer page to verify any installation, warranty, delivery or model-number details before buying.
| Brand | Hypnos |
|---|---|
| Type | Mattress |
| Sizes tracked | Single, Small Double, Double, King Size, Super King |
| Price range | £504-£818 |
| Owner rating signal | 4.7 out of 5 shown; review volume needs checking with the retailer |
| Last checked | 2026-08-03 |
What Mattress Online says about this mattress
The retailer describes the Hypnos Cawthorne Support Mattress as firm, with ReActive pocket springs, cotton comfort fillings and eOlus fibres in the comfort layers. It is also shown as handcrafted in the UK, with a 100-night comfort trial and a 5-year guarantee listed on the page. Those are the details that matter most here: support type, feel, added reassurance and whether the build matches the type of mattress you want.
What the wider comparison picture suggests
Across 66 comparable mattresses, the Cawthorne Support starts above the median peer price of £466.50, so the opening price is firmly mid-pack rather than value-end. It also has five tracked variants, which is above the comparable median of four, so the size spread is a little broader than average. The visible owner rating is 4.7 out of 5 from 47 reviews, which is encouraging, but it should be read as retailer-visible feedback rather than broad independent consensus.
The main trade-offs to weigh up
The key decision is whether the firm, pocket-sprung Hypnos Cawthorne Support Mattress at £549 from the single size is worth paying a bit more for than some nearby models. If you want a mattress that feels more supportive and less plush, the ReActive spring construction and cotton comfort fillings may fit better than a softer-feeling alternative; if you want a more cushioned surface, compare it first with options like the Sleepeezee Fusion Pro Mattress or Komfi GelMed Comfort Mattress. Also check the practical terms that matter at checkout: current price, stock, delivery details, trial coverage and guarantee wording can all change the value picture.
Price and value benchmark
At £549 for the starting size, this model sits above the comparable-product median of £466.50, so it is priced as a mainstream branded option rather than an entry-level one. The single is the lowest tracked price, while the Super King reaches £909, so the size you choose makes a material difference to value. Against nearby alternatives starting at £539, £578 and £614, the Cawthorne Support only looks strong on value if the firm feel and five-size spread are close to what you need.
How it compares with nearby alternatives
Compared with the Sleepeezee Fusion Pro Mattress, this Hypnos model starts £10 higher, while the Komfi GelMed Comfort Mattress starts £29 higher in the comparison set. The Hypnos Cawthorne Deluxe Mattress starts lower at £404 and also offers the same five tracked sizes, which makes it the clearest brand-internal comparison if you are deciding whether to spend more for the Support version. If you are shopping on structure rather than branding, compare pocket-sprung support, comfort-layer materials and how many sizes each mattress actually offers.
How much weight to give the rating
Mattress Online shows a 4.7 out of 5 owner rating from 47 reviews, which is a positive visible signal but not a deep review pool. Because the feedback is retailer-visible and model-specific third-party coverage is limited, it should be treated as supporting context rather than proof of broad consensus. If you value review volume, check how many reviews sit behind the score and whether they all refer to this exact Hypnos Cawthorne Support Mattress listing.
Who it suits
This mattress should suit shoppers who want a firm mattress with pocket-sprung support and a cotton-led comfort feel. It also makes sense for buyers who want choice across five sizes, from Single through Super King, and who like the reassurance of a 100-night trial plus a 5-year guarantee. If your priorities are straightforward support, a recognised brand and a traditional comfort profile, it is worth shortlisting.
Who should avoid it
If you prefer a softer feel, this is probably not the first mattress to compare, because the retailer page is clear about the firm tension. Budget-focused shoppers may also find the £549 starting price harder to justify when the Hypnos Cawthorne Deluxe Mattress begins lower in the same brand family. Anyone with a tight bed-frame fit should verify the mattress depth and compatibility with their frame, bedding and topper before buying.
Comfort and support in plain English
The support story here is built around the Hypnos Cawthorne Support Mattress’s ReActive pocket springs, which are paired with cotton comfort fillings and eOlus fibres in the upper layers. In practical terms, that points to a firmer, more structured feel rather than a deeply cushioned one, with the pocket-sprung format often chosen by shoppers who want support across the mattress surface. The retailer also notes that depth matters for bedding, toppers and bed frames, so it is sensible to verify the exact depth before ordering, especially if you need the mattress to work with a low-profile setup.
Value check
Value depends less on the headline price and more on whether the specification matches your priorities. The 100-night comfort trial and 5-year guarantee are useful parts of the package, but they do not automatically make this the cheapest or best-value option in the set. For the right shopper, the firm feel, five-size spread and Hypnos branding may justify the mid-range pricing; for others, a lower-starting alternative may make more sense.
Good alternatives to compare
The closest alternatives to compare with Hypnos Cawthorne Support Mattress include Hypnos Cawthorne Deluxe Mattress, Hypnos Cawthorne Luxury Mattress, Sleepeezee Fusion Pro Mattress. Use these cards to check whether a nearby model gives you a better price, a more suitable specification or a clearer match for your space and budget.
Available 
Hypnos Cawthorne Luxury Mattress
from £565-£915.
£565-£915
Sizes tracked: Single, Small Double, Double, King Size, Super King
Available 
Sleepeezee Fusion Pro Mattress
from £599-£1,049.
£599-£1,049
Sizes tracked: Single, Double, King Size, Super King
Retailer details used
Last checked 2026-08-03. The source list below is included to help you check the details behind the comparison. Always confirm the latest price, delivery cost, stock status and product details with the retailer before buying.
More mattresses to compare
These related guides and reviews can help you compare nearby options before buying.
Questions about this mattress
Is Hypnos Cawthorne Support Mattress worth shortlisting if I want a firm mattress?
Yes, it is worth shortlisting if you want a firm-feel mattress with pocket-sprung support and cotton comfort fillings. It is priced from £549, so it makes most sense if the feel and size range suit your needs rather than if you are shopping purely on price.
How does the 100-night comfort trial work, and does it apply to this listing?
Mattress Online shows a 100-night comfort trial on this product page, but you should still check the current terms before buying. Confirm whether it applies to your exact size and purchase channel, and whether any returns or collection conditions apply.
How does the price compare with Sleepeezee Fusion Pro Mattress and Komfi GelMed Comfort Mattress?
In the current comparison set, the Sleepeezee Fusion Pro Mattress starts at £539 and the Komfi GelMed Comfort Mattress starts at £578, while the Hypnos Cawthorne Support Mattress starts at £549. That puts the Hypnos model between those two, so the better choice depends on feel, size spread and the exact terms on each retailer page.
Should I trust the 4.7 rating on Mattress Online?
Treat it as a useful retailer-visible signal rather than broad independent proof. The listing shows 4.7 out of 5 from 47 reviews, which is positive, but you should still look at review volume, product-specific comments and the latest retailer page before relying on it.
What sizes are available, and which size is best for my bed frame?
Tracked sizes include Single, Small Double, Double, King Size and Super King. The best choice depends on your frame and room space, so check mattress depth, exact dimensions and whether your bed base, headboard and bedding are suited to the size you choose.