Available 
Aspire Pocket+ 1000 Tufted Mattress
from £205-£305.
£205-£305
Sizes tracked: Small Single, Single, Small Double, Double, King Size
Buying guide
Best mattresses for king size beds to compare
Compare five king size mattresses by comfort feel, construction and value. Start with the Aspire, Bodyshape Boost and Bodyshape Gel models, then weigh medium feel, support style and trial terms before you choose.
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Last verified: 2026-10-02
Quick verdict
This is a comparison shortlist, not a single-winner page, so the job here is to narrow the field by feel, construction and value. The five king size mattresses on this page come from Aspire, Bodyshape and Horizon, and they cover pocket sprung and hybrid builds. The main shortlist price spread runs from £205 to £459, while the wider product-page price ranges go higher on some models, so it is worth checking the exact king size price before you buy. If you want a practical starting point, compare Aspire Pocket+ 1000 Tufted Mattress, Bodyshape Boost 1000 Pocket Memory Mattress and Bodyshape Gel 2000 Pocket Hybrid Mattress first, because they give you three clearly different routes through the shortlist.
Top picks to compare
Start with Aspire Pocket+ 1000 Tufted Mattress (£205-£305), Bodyshape Boost 1000 Pocket Memory Mattress (£254-£498), Bodyshape Gel 2000 Pocket Hybrid Mattress (£284-£544) because they give you a focused set of current retailer options to compare. The visible price range is £205-£959, so check whether the extra spend buys a useful specification difference rather than only a different brand or finish. The shortlist includes Aspire, Bodyshape, Horizon, which helps you compare familiar brands against specification, delivery and value.
Available 
Bodyshape Boost 1000 Pocket Memory Mattress
from £254-£498.
£254-£498
Sizes tracked: Single, Small Double, Double, King Size, Super King
Available 
Bodyshape Gel 2000 Pocket Hybrid Mattress
from £284-£544.
£284-£544
Sizes tracked: Single, Small Double, Double, King Size, Super King
Available 
Bodyshape Ultra Ortho 1500 Pocket Mattress
from £389-£679.
£389-£679
Sizes tracked: Single, Small Double, Double, King Size, Super King
Available 
Horizon Juno 5000 Pocket Memory Mattress
from £459-£959.
£459-£959
Sizes tracked: Single, Small Double, Double, King Size, Super King
At-a-glance comparison
Use this table to scan the shortlist quickly before opening individual product pages. It covers Pocket Sprung, Hybrid, so compare like-for-like where possible before deciding which mattress best fits your usual sleep position, preferred firmness and bed-frame size. Firmness differences include Firm; Firmness differences can matter as much as headline price when you are matching a product to a specific need.
| Product | Type | Firmness | Sizes | From |
|---|---|---|---|---|
| Aspire Pocket+ 1000 Tufted Mattress | Pocket Sprung | Check retailer | Small Single, Single, Small Double, Double, King Size | £205 |
| Bodyshape Boost 1000 Pocket Memory Mattress | Pocket Sprung | Check retailer | Single, Small Double, Double, King Size, Super King | £254 |
| Bodyshape Gel 2000 Pocket Hybrid Mattress | Hybrid | Check retailer | Single, Small Double, Double, King Size, Super King | £284 |
| Bodyshape Ultra Ortho 1500 Pocket Mattress | Pocket Sprung | Firm | Single, Small Double, Double, King Size, Super King | £389 |
| Horizon Juno 5000 Pocket Memory Mattress | Pocket Sprung | Check retailer | Single, Small Double, Double, King Size, Super King | £459 |
What the evidence supports
The visible product-page ratings are all 5/5, but each one rests on a very small review sample, so treat them as a light signal rather than broad proof of quality. The retailer also mentions a 100-night comfort trial, but it is described as conditional rather than automatic, so the exact terms need to be checked before you rely on it. Free delivery to most locations and old mattress removal are useful retailer extras, but postcode stock, delivery slots and king-size availability still need a final check at checkout. That makes this a useful comparison page for narrowing choices, not a claim that one mattress has been fully proven better than the others.
Main trade-offs to compare
The first trade-off is feel. Aspire Pocket+ 1000 Tufted Mattress is medium and uses pocket springs with soft white fibres, which should suit shoppers who want a straightforward supportive feel without a thicker comfort layer. Bodyshape Boost 1000 Pocket Memory Mattress is also medium but adds a memory foam comfort layer, so it is the more obvious pick if you want a closer contouring feel. Bodyshape Gel 2000 Pocket Hybrid Mattress is medium too, but the gel foam is positioned by the retailer as a cooler-feel alternative to traditional memory foam, and the hybrid build may appeal if you want a blend of spring support and foam comfort. The second trade-off is support style and price. Aspire is the lower-cost, simpler pocket-sprung option, Boost adds a more cushioned comfort layer, and Gel 2000 sits between comfort-layer styles with hybrid construction. If you want the cleanest value comparison, ask whether the extra spend buys a feel you actually want, rather than just a different product name.
Why these mattresses made the shortlist
These five mattresses were shortlisted because they give a useful king-size comparison across three brands: Aspire, Bodyshape and Horizon. They also cover two product types, pocket sprung and hybrid, which makes it easier to compare construction rather than just price tags. The shortlist is based on current retailer listings, visible prices, variant coverage and review details, so it is designed to help you compare specification and fit, not to act as a complete market ranking. That is also why Horizon is included even though it is not one of the first three mattresses you may compare: it helps show the upper end of the shortlist benchmark and gives the page a fuller price spread.
Shortlist benchmark at a glance
The benchmark price spread for this shortlist runs from £205 to £459. Aspire sits at the lower end, Bodyshape covers the middle of the field, and Horizon appears at the upper end of the benchmark. Across the shortlist you are comparing Aspire, Bodyshape and Horizon across Pocket Sprung and Hybrid constructions, with one clearly firmer option in the broader set. The ratings display as 5/5 across the current product pages, but the small review samples mean the scores should be read as snapshots rather than settled verdicts. For a quick check, compare brand, product type, firmness and guarantee length before you focus on the exact king-size price.
How to choose the right king size mattress
Start with the UK king-size measurement of 150 x 200cm and make sure your bed frame, bedding and mattress depth all work together. If you want the simplest lower-cost route, Aspire Pocket+ 1000 Tufted Mattress is the plain pocket-sprung choice in the group and is the easiest starting point for a no-fuss supportive feel. If you want a plusher comfort layer, Bodyshape Boost 1000 Pocket Memory Mattress adds memory foam and may suit shoppers who like a more body-hugging surface. If you want a hybrid build with gel foam, Bodyshape Gel 2000 Pocket Hybrid Mattress is the clearest fit and may suit shoppers who want spring support plus a foam comfort layer. Horizon is useful if you want to compare what a higher-priced shortlist option looks like against the medium-feel Bodyshape and Aspire models. Before you buy, check postcode delivery, old mattress removal if needed, bed-frame compatibility and the comfort-trial conditions, because the retailer describes the 100-night trial as conditional rather than automatic.
Value: what the extra spend buys
Value is not just about the lowest starting price. Aspire starts from £205 and carries a 5-year guarantee, Bodyshape Boost starts from £254 and carries a 1-year guarantee, and Bodyshape Gel 2000 starts from £284 with a 5-year guarantee. That makes the value question practical: does the extra spend buy a comfort layer you prefer, a different support feel, or a guarantee length that feels more reassuring? A higher price does not automatically mean a better fit for your room or your sleep setup. If two mattresses look similar on paper, the simpler and lower-priced option may be the better king-size buy.
Retailer details used
Last checked 2026-10-02. 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.
- Aspire Pocket+ 1000 Tufted Mattress | MattressOnlineproduct-page evidence for Aspire Pocket+ 1000 Tufted Mattress
- Bodyshape Boost 1000 Pocket Memory Mattress | MattressOnlineproduct-page evidence for Bodyshape Boost 1000 Pocket Memory Mattress
- Bodyshape Gel 2000 Pocket Hybrid Mattress | MattressOnlineproduct-page evidence for Bodyshape Gel 2000 Pocket Hybrid Mattress
- Best king size mattress - Expert ReviewsComparable guide criteria and first-hand testing methodology, not shortlist ranking
- MattressOnline comfort trialConditional exchange, protector and fee
- Aspire Pocket+ 1000 Tufted - MattressOnlineExact model specification, sizes, rating and conflicting small-double width
Helpful next reads
Keep comparing with related reviews and buying guides before checking the latest retailer prices.
Buying questions
Which mattress type is best for a king size bed: pocket sprung, memory foam or hybrid?
There is no single best type for every shopper. On this shortlist, Aspire is the simpler pocket-sprung model, Bodyshape Boost adds memory foam, and Bodyshape Gel 2000 uses a hybrid build with gel foam, so the right choice depends on the feel and construction you prefer.
Is the cheapest king size mattress on the shortlist the best value?
Not automatically. Aspire is the lowest-priced option in the group, but value also depends on the feel you want, the guarantee length and whether you prefer a simpler pocket-sprung build over memory foam or a hybrid mattress.
Why do the ratings all show 5/5 if the review counts are small?
Because the visible product-page ratings are based on very small samples. That makes the scores worth noting, but not something you should treat as broad proof that one mattress is better than another for every buyer.
What should I check before ordering a king size mattress online?
Check the exact 150 x 200cm king-size fit, your bed-frame compatibility, mattress depth, delivery to your postcode and the comfort-trial terms. It is also sensible to confirm whether old mattress removal is needed before checkout.
Does the 100-night comfort trial apply automatically?
No. The retailer describes it as conditional, so you should read the terms carefully before ordering. The trial page says a protector must be bought and used, at least 30 nights must pass, and a £49 exchange fee applies.