Available 
Kaymed Smart Phase 1600 Pocket Hybrid Mattress
from £699-£1,189.
£699-£1,189
Sizes tracked: Single, Double, King Size, Super King
Kaymed Hybrid
Kaymed Heavy Sleeper 1200 Pocket Hybrid Mattress review
Kaymed Heavy Sleeper 1200 Pocket Hybrid Mattress is a firm-feel hybrid shortlist with pocket spring support, Reflex Foam comfort layers and reassurance extras.
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Last verified: 2026-10-01
Quick verdict
Kaymed Heavy Sleeper 1200 Pocket Hybrid Mattress is best read as a compare-first firm hybrid rather than a proven crowd favourite. It combines pocket spring support with Reflex Foam comfort layers, and MattressOnline adds a 100-night comfort trial plus a 10-year guarantee. If you want a firmer feel and those reassurance extras matter to you, it is worth shortlisting alongside nearby hybrids at similar prices.
Available sizes and prices
Kaymed Heavy Sleeper 1200 Pocket Hybrid Mattress is listed with 4 size options from £629-£1,119. The visible sizes include Single, Double, King Size, Super King, 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.
Key product details
These are the retailer details worth checking first for Kaymed Heavy Sleeper 1200 Pocket Hybrid Mattress: Brand: Kaymed; Type: Hybrid; Sizes tracked: Single, Double, King Size, Super King; Price range: £629-£1,119. 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 | Kaymed |
|---|---|
| Type | Hybrid |
| Sizes tracked | Single, Double, King Size, Super King |
| Price range | £629-£1,119 |
| Owner rating signal | Not enough owner-review data yet |
| Last checked | 2026-10-01 |
What the retailer page confirms
MattressOnline lists this as a firm mattress with pocket springs and Reflex Foam comfort layers, so the headline construction is clear. The page also says the product is National Bed Federation approved and conforms to BS7177:2008 for home use, which is useful for checking standards and intended use. As with any mattress, confirm the exact depth, size and checkout details on the live page before ordering.
What the wider comparison adds
The price starts at £629, which sits close to the comparable-product median of £648, so this is not a budget outlier or a premium outlier. There are 4 tracked variants, matching the typical spread in the comparison set, which makes it easy to weigh Single, Double, King Size and Super King against nearby hybrids. The main caution is review evidence: the exact model still has little public owner-review volume, so shopper confidence comes more from the specification and retailer assurances than from a long review history.
Buyer trade-offs to weigh up
The biggest trade-off is firmness versus feel: this mattress is positioned as firm, so it is better suited to shoppers who already know they like a more supportive surface than those wanting a softer landing. Another trade-off is reassurance versus proof: the 100-night trial and 10-year guarantee are helpful retailer promises, but they are not independent performance evidence. Finally, value depends on size choice and final checkout price, so compare the live delivery cost and size-specific total before you decide.
Price and value benchmark
The tracked price range runs from £629 for Single to £1,119 for Super King, with Double at £829 and King Size at £909. Against the comparable hybrid set, the starting price is close to the median, so the value question is really about whether the firm feel, pocket spring support and reassurance extras fit your needs. If you are comparing bigger sizes, check whether a nearby alternative changes the specification enough to justify the extra spend.
How it compares with nearby alternatives
If you are comparing within Kaymed, the Smart Phase 1600 Pocket Hybrid Mattress starts higher at £699 and the Smart Phase 2000 Pocket Hybrid Mattress starts at £799, so both ask you to pay more for a different specification path. A nearer-feel comparison is the Luna 6000 Plush Gel Memory Pocket Hybrid Mattress, which starts at £628 and is described as plush/soft, making it a useful contrast if you are unsure about the firm feel here. That makes this model more of a firm-value benchmark than an obvious like-for-like winner.
How to read the review evidence
Review evidence for the exact Kaymed Heavy Sleeper 1200 Pocket Hybrid Mattress is still thin, and MattressOnline itself says it is collecting reviews. There is some supporting context from a small third-party source and from Kaymed brand-level information, but that is supporting context rather than proof of how this specific mattress performs over time. Treat merchant reputation and brand background as reassurance for the seller and manufacturer, not as a substitute for product-specific owner feedback.
Who it suits
This mattress suits shoppers who want a firm hybrid with pocket spring support and foam comfort layers, especially if they prefer a clearer, more supportive feel. It also makes sense for buyers who value reassurance extras such as the 100-night trial and 10-year guarantee, because those can reduce the risk of buying a mattress you have not handled in person. If you are comparing several firm options, the available Single, Double, King Size and Super King sizes make it easy to match to budget and room space.
Who should look elsewhere
Look elsewhere if you know you prefer a softer sleep surface, because this Kaymed Heavy Sleeper 1200 Pocket Hybrid Mattress is positioned as firm and may feel too supportive for that preference. It is also a weaker fit for shoppers who want strong public proof from lots of owner reviews, since the exact model still has little verified review volume and MattressOnline is still collecting feedback. If you are shopping mainly on lower price or a very different construction, nearby hybrids such as the Luna 6000 Plush Gel Memory Pocket Hybrid Mattress may be a better starting point than paying for this firm hybrid's reassurance extras.
Comfort and support
The comfort story here is straightforward: Kaymed Heavy Sleeper 1200 Pocket Hybrid Mattress uses pocket springs for the main support structure, with Reflex Foam comfort layers on top. That combination usually suits shoppers who want a more structured feel than an all-foam mattress, but the firm rating means the overall sensation should be checked against your own comfort preference. MattressOnline also flags depth as an important detail, so confirm bed-frame compatibility and any bedding or topper fit before ordering.
Value verdict
Value is decent if you want a firm hybrid and will make use of the trial, guarantee and size spread, but it is less convincing if you are chasing the lowest possible entry price or the strongest public review proof. At £629 to £1,119, it sits in the middle of the market rather than undercutting it, so comparison with nearby hybrids is still worthwhile. MattressOnline's strong reputation helps confidence in the retailer, not the mattress performance itself, so keep checking the live price and delivery terms before buying.
Good alternatives to compare
The closest alternatives to compare with Kaymed Heavy Sleeper 1200 Pocket Hybrid Mattress include Kaymed Smart Phase 1600 Pocket Hybrid Mattress, Kaymed Smart Phase 2000 Pocket Hybrid Mattress, Luna 6000 Plush Gel Memory Pocket Hybrid 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 
Kaymed Smart Phase 2000 Pocket Hybrid Mattress
from £799-£1,650.
£799-£1,650
Sizes tracked: Single, Double, King Size, Super King
Available 
Luna 6000 Plush Gel Memory Pocket Hybrid Mattress
from £628-£883.
£628-£883
Sizes tracked: Double, King Size, Super King
Retailer details used
Last checked 2026-10-01. 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 the Kaymed Heavy Sleeper 1200 Pocket Hybrid Mattress worth shortlisting?
Yes, if you want a firm-feel hybrid with pocket springs, Reflex Foam comfort layers, a 100-night comfort trial and a 10-year guarantee. It is best treated as a compare-first option because the exact model still has limited owner-review volume.
What does the firm hybrid construction mean for comfort and support?
It means the mattress combines pocket spring support with a Reflex Foam comfort layer, so the feel should be more structured than a softer plush model. That suits shoppers who already prefer a firmer surface, but it is worth comparing against softer or medium-feel hybrids if you are unsure.
How do the sizes and prices compare?
Tracked sizes are Single at £629, Double at £829, King Size at £909 and Super King at £1,119. That gives you a clear size-to-budget ladder, but you should still check the live checkout price, delivery charge and availability before ordering.
Why is the review details cautious on this mattress?
MattressOnline says reviews are still being collected for the product, so there is not yet a strong on-page owner review base. A small amount of third-party commentary and brand-level context exists, but that is supporting context rather than solid proof of long-term owner experience.
Who is this mattress best suited to, and who should avoid it?
It looks best for shoppers who want a firm hybrid, everyday comfort and some extra reassurance from the trial and guarantee. Shoppers who want a softer feel, a lower budget or stronger product-specific review proof should keep comparing.