Available 
Horizon Juno 5000 Pocket Memory Mattress
from £388-£815.
£388-£815
Sizes tracked: Single, Small Double, Double, King Size, Super King
Horizon Pocket Sprung
Horizon Adventurer 1000 Pocket Memory Mattress review
The Horizon Adventurer 1000 Pocket Memory Mattress is a medium-to-firm pocket sprung option with a memory foam comfort layer, five sizes and a value-led price spread.
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Last verified: 2026-10-20
Quick verdict
The Horizon Adventurer 1000 Pocket Memory Mattress looks like a sensible shortlist pick if you want a medium-to-firm feel, 1000 pocket springs and a memory foam comfort layer without moving into premium pricing. Tracked prices run from £234 to £434 depending on size, so it is worth comparing the exact size you need rather than judging it on the headline alone. The 100-night comfort trial and 5-year guarantee add useful reassurance, but the trial terms should be checked before you buy.
Available sizes and prices
Horizon Adventurer 1000 Pocket Memory Mattress is listed with 5 size options from £285-£825. 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 | £285 | In stock | 2026-10-20 | View |
| Small Double | Check retailer | £349 | In stock | 2026-10-20 | View |
| Double | Check retailer | £730 | Check retailer | 2026-10-20 | View |
| King Size | Check retailer | £825 | Check retailer | 2026-10-20 | View |
| Super King | Check retailer | £505 | Check retailer | 2026-10-20 | View |
Key product details
These are the retailer details worth checking first for Horizon Adventurer 1000 Pocket Memory Mattress: Brand: Horizon; Type: Pocket Sprung; Sizes tracked: Single, Small Double, Double, King Size, Super King; Price range: £285-£825. 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 | Horizon |
|---|---|
| Type | Pocket Sprung |
| Sizes tracked | Single, Small Double, Double, King Size, Super King |
| Price range | £285-£825 |
| Owner rating signal | 4.6 out of 5 shown; review volume needs checking with the retailer |
| Last checked | 2026-10-20 |
What the Mattress Online listing shows
Mattress Online lists the Horizon Adventurer 1000 Pocket Memory Mattress as 25cm deep, single-sided and delivered rolled, with a note to rotate it every three months. The retailer also highlights free delivery to most locations and optional old mattress removal, which matters if access, setup or disposal is part of the decision. Fire resistance to BS7177: 2008 is stated for home use, and the current description mentions cooling memory foam and 1000 pocket springs.
Key takeaways from the wider comparison
At £234 on the lowest tracked size, this sits below the comparable-product median of £615, so the value case is built around the exact size and specification rather than a broad premium claim. It also has 5 tracked variants, above the median of 4, which makes it easier to match to different room sizes and budgets. The visible 4.6 out of 5 rating with 149 reviews shown is encouraging, but the review volume is not strong enough to treat the score as decisive on its own. That means the useful shopper question is not just whether the rating looks good, but whether the firmness, depth and size fit your own setup.
Buyer trade-offs to weigh before ordering
The main trade-off here is between price, firmness and the protection offered by the retailer terms. A medium-to-firm mattress can suit shoppers who want a more supported surface, but feel is personal, so the 100-night comfort trial is only useful if you are happy to follow the stated conditions. Because sizes range from Single to Super King, compare the current price for your exact size, then check whether the 5-year guarantee covers the parts you expect and whether the rolled format will suit your access and setup needs.
Price and value benchmark
The tracked price spread of £234 to £434 puts the Horizon Adventurer 1000 Pocket Memory Mattress in a lower-price position than many similar pocket sprung options we compared. That does not make it automatically the cheapest or best value, because value changes by size: a Single at £234 and a Super King at £434 should be judged against room fit, budget and what else is included. The most sensible value check is to compare the current size price with the mattress depth, spring count, trial and guarantee rather than looking at price alone.
How it compares with nearby alternatives
Compared with the Horizon Discovery 2000 Pocket Memory Mattress and Horizon Juno 5000 Pocket Memory Mattress, the Adventurer sits lower in price and has a simpler specification focus, which may suit shoppers who want to keep spend under control. Both Horizon alternatives also use pocket-sprung construction and come in the same size family, so they are useful for a like-for-like check on price, spring count and comfort features rather than a complete change of mattress type. Nearby options such as the Discovery 2000, Juno 5000 and Aspire Pocket+ 1000 Tufted Mattress show how quickly the price and feature set can move once you change brand or specification. The Adventurer’s 5 tracked sizes are useful if you want a straightforward comparison between budget, room size and comfort preference without stepping into much higher-priced models.
How to read the review evidence
The visible 4.6 out of 5 rating is a positive sign, but it should be treated cautiously because the page shows 149 reviews rather than a very large review base. That means the rating can help with initial screening, but it is not strong enough on its own to settle questions about firmness, long-term comfort or whether the current version matches older public references. If you are close to buying, check that the reviews are for the current model and not an earlier formulation.
Who it suits
This Horizon mattress should suit shoppers looking for a medium-to-firm feel, pocket sprung support and a memory foam comfort layer in a practical, rolled delivery format. At a tracked starting price of £234, it is a realistic option for everyday comfort if you want a supported surface rather than a softer sink-in feel, and the 25cm depth gives you a clear setup check before ordering. It is especially worth a look if you want a size choice that ranges from Single to Super King and you plan to compare frame clearance, fitted-sheet depth and room access in advance.
Who should avoid it
If you want a clearly softer or more obviously cushioned feel, this Horizon Adventurer 1000 Pocket Memory Mattress may not be the right starting point, because the listed firmness is medium-to-firm. Shoppers who need a different feel or construction should compare it with alternatives before deciding, and anyone unsure about frame or bedding fit should check the 25cm depth against their setup first. It is also sensible to confirm the 100-night comfort trial conditions and not assume the offer is identical to every other mattress trial.
Comfort and support
The construction combines pocket springs with a memory foam comfort layer, so the feel should be judged as a mix of spring support and a foam top rather than as a pure memory foam mattress. That makes the Horizon Adventurer 1000 Pocket Memory Mattress easy to compare against all-foam or firmer all-sprung options, while keeping the support conversation practical rather than medical. Sleep position still matters here: a medium-to-firm mattress may suit some back or front sleepers better than a softer bed, but comfort remains personal and should be checked against the retailer trial terms.
Value check
On value, the Horizon Adventurer 1000 Pocket Memory Mattress is strongest when you judge it by the specific size, current price, 100-night comfort trial, 5-year guarantee and free-delivery offer rather than by headline features alone. The size spread from Single to Super King makes it easier to match spend to the room and the sleeper, which is helpful if you are comparing it with pricier Horizon models or similar pocket sprung alternatives. If the medium-to-firm feel and rolled delivery suit your setup, it presents a practical value case, but the latest retailer price and stock should be checked before ordering.
Good alternatives to compare
The closest alternatives to compare with Horizon Adventurer 1000 Pocket Memory Mattress include Horizon Juno 5000 Pocket Memory Mattress, Bodyshape Boost 1000 Pocket Memory Mattress, Horizon Odyssey 800 Pocket Memory 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 
Bodyshape Boost 1000 Pocket Memory Mattress
from £299-£589.
£299-£589
Sizes tracked: Single, Small Double, Double, King Size, Super King
Available 
Horizon Odyssey 800 Pocket Memory Mattress
from £339-£910.
£339-£910
Sizes tracked: Single, Small Double, Double, King Size, Super King
Retailer details used
Last checked 2026-10-20. 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 Horizon Adventurer 1000 Pocket Memory Mattress good value?
It can be, especially at the lower end of the tracked range. The strongest value case comes from its £234 to £434 size spread, 25cm depth, 100-night comfort trial and 5-year guarantee, but you should compare the exact size price before deciding.
What does medium-to-firm mean for this mattress?
It means the retailer is positioning it towards a more supported feel rather than a soft sink-in surface. That may suit shoppers who prefer a steadier base, but comfort is subjective, so the label should be checked against your own preference and the trial terms.
What should I check before buying the rolled 25cm mattress?
Check frame clearance, fitted sheet depth and any topper you plan to use, because the mattress is 25cm deep and arrives rolled. It is also worth confirming delivery to your postcode, stock for your size and whether old mattress removal is available if you need it.
Does the price change by size?
Yes. The tracked prices run from £234 for a Single to £434 for a Super King, so size makes a real difference to the final cost. Compare the exact size you need rather than using the headline price alone.
Is the 4.6 rating enough to trust this mattress?
It is a positive sign, but not a complete verdict. The page shows 4.6 out of 5 from 149 reviews, which is useful context, yet the review volume is not large enough to treat the score as conclusive on its own.