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 beds to compare
Compare five Mattress Online king-size mattresses by construction, firmness and care effort to find the best fit for your bed and budget.
Sleep Savvy may earn a commission if you buy through links on this site.
Last verified: 2026-10-08
Quick verdict
This is a king-size comparison shortlist, not a single universal winner. The current spread starts at Aspire Pocket+ 1000 Tufted Mattress from £205 and reaches Horizon Juno 5000 Pocket Memory Mattress up to £959, so the value jump is mainly about what each design adds for the money. Mattress Online also offers a 100-night comfort trial, but the terms are conditional, so it is worth checking the live page before you buy.
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 (£335-£605) 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 £335-£605.
£335-£605
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 | £335 |
| 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 matters most in this shortlist
The practical baseline here is UK king size, which measures 150 x 200cm, so bed-frame fit and bedding size should be checked before you compare comfort features. The shortlist mixes pocket sprung and hybrid designs: Aspire Pocket+ 1000 and Bodyshape Boost 1000 are pocket sprung, while Bodyshape Gel 2000 adds gel foam into a hybrid build. Visible retailer ratings are all 5/5, but the review counts are small — for example, Aspire shows 9 reviews, Boost 1, Gel 3, Ultra Ortho 5 and Horizon Juno 2 — so that feedback is useful as a signal, not proof of broad satisfaction.
Buyer trade-offs to weigh
If you want lower maintenance, note that Aspire Pocket+ 1000 is single-sided, while Bodyshape Boost 1000 and Bodyshape Ultra Ortho 1500 are double-sided and need more care. Depth also matters: Aspire is 23cm, while Boost, Gel and Ultra Ortho are 25cm, which can affect frame clearance and fitted-sheet choice. The ratings look perfect across the shortlist, but the sample sizes are tiny, so it is smarter to compare construction, guarantee length and sidedness than to rely on stars alone.
Why these mattresses made the shortlist
The shortlist brings together five mattresses from three brands — Aspire, Bodyshape and Horizon — so shoppers can compare a compact set rather than trawling the full category. The product mix covers pocket sprung and hybrid options, with a useful spread from simpler builds like Aspire Pocket+ 1000 to more layered models such as Bodyshape Gel 2000 and Horizon Juno 5000. That makes the page useful for comparing feel, care effort and price, but not definitive enough to crown one best king mattress for every sleeper.
How the shortlist compares on price and build
The benchmark range across the shortlist is £205-£459, while the broader product set runs wider, so the listed mattresses cover a useful mid-market spread rather than the whole field. At the lower end, Aspire Pocket+ 1000 pairs 1000 pocket springs with a soft white fibre layer and a 5-year guarantee; at the higher end, Horizon Juno 5000 moves into a more layered memory-foam format and sits at the top of the visible benchmark range. Guarantee terms vary too, with 5 years on Aspire and Gel versus 1 year on Boost and Ultra Ortho, so the higher price does not always buy a longer cover period.
How to choose the right king mattress
Start with sleep scenario first: if you want a simpler pocket sprung mattress at the lowest entry price, Aspire Pocket+ 1000 is the clearest budget-led option in the group. If you want a medium-feel mattress with memory foam, Bodyshape Boost 1000 may suit you better, while Bodyshape Gel 2000 adds a hybrid build and a seller claim of a cooler-feeling gel foam layer. Before ordering, verify the live king-size listing, bed-frame compatibility, delivery timing and whether the 100-night comfort trial still carries the same conditions.
Where the value looks strongest
Value here is about what the extra spend seems to buy: Aspire is the cheapest route into the shortlist, Boost adds memory foam and a double-sided design, Gel adds a hybrid construction and a 5-year guarantee, while Ultra Ortho 1500 shifts toward firmer support. Because the visible ratings are all 5/5 but based on very small samples, price should be judged alongside construction and care effort rather than review stars alone. Check the retailer for the latest price and availability before deciding, especially if you are comparing the £205-£459 shortlist against the wider set that goes much higher.
Retailer details used
Last checked 2026-10-08. 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
- Toms Guide UK best mattressesComparable guide separates sleep needs, construction, budget and trial
- MattressOnline comfort trialConditional exchange terms
- Aspire Pocket+ 1000Exact shortlisted mattress construction, dimensions and owner sample
Helpful next reads
Keep comparing with related reviews and buying guides before checking the latest retailer prices.
Buying questions
Is the Mattress Online 100-night trial a full refund?
No. The supplied trial terms are conditional rather than an unconditional refund, so you should check the live Mattress Online trial page for the current requirements before ordering.
How do I choose between pocket sprung and hybrid on this shortlist?
Pocket sprung options like Aspire Pocket+ 1000 and Bodyshape Boost 1000 keep the build simpler, while Bodyshape Gel 2000 adds a hybrid foam layer. Choose based on whether you want a more straightforward spring-led feel or a more layered construction.
Are the 5/5 ratings enough to pick one mattress?
Not on their own. The review counts are very small — some products have only one to nine visible reviews — so the stars are a useful signal, but not strong enough to prove broad satisfaction or settle the choice for you.
What should I check before buying a king-size mattress?
Confirm the UK king size is 150 x 200cm, then check frame clearance, fitted-sheet size, sidedness, depth and current delivery details. That matters here because the shortlist ranges from 23cm to 25cm deep and includes both single- and double-sided designs.