Horizon Adventurer 1000 Pocket Memory Mattress
Mattress
Horizon Adventurer 1000 Pocket Memory Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
25
Layers
3
Layer Details
- Bamboo Memory Foam. A bamboo-infused memory foam layer moulds around your shape, which means built-up pressure on hips and shoulders is eased and aches are relieved. The bamboo adds breathability, helping to dispel heat and moisture.
- High Density Foam. A durable, cushioning layer of high density foam sits beneath the memory foam, adding comfort. It also helps reduce motion transfer, so you feel less of a partner's movement.
- Pocket Springs. 1000 pocket springs respond individually to each area of your body, which means personalised support rather than a one-feel-fits-all base. They also cut down motion transfer between partners.
Layer details from mattressonline.co.uk product page, September 2026.
- Real space for two: At 75cm each for two people sharing, you can change position without negotiating, useful on a medium firm mattress where you sit on the surface rather than sink in.
- Less partner disturbance: The 1000 pocket springs respond individually, and the UK king's width keeps you further from a restless or early-rising partner, so movement on one side barely registers.
- Length for taller sleepers: The 200cm length is 10cm more than the UK double, which means anyone approaching six foot stops sleeping with their feet at the edge.
- Budget hybrid at family scale: This mattress sits at the affordable end of the hybrid market, so upgrading to a UK king costs less than it would with most spring and memory foam pairings.
- Room for the dog too: If a pet claims a corner every night, the extra 15cm of width over a UK double means you lose less of your own share.
This size suits you if...
You share the bed every night and a UK double has started to feel cramped, especially with the medium firm surface keeping you both on top rather than settled into a dip. Or one of you is close to six foot and needs the 200cm length as much as the width. It also suits couples on mismatched schedules who want distance between them when one gets up early.
Consider another size if...
Your bedroom is smaller than the 2.7m x 2.9m we suggest for a UK king, or you sleep alone. We'd recommend the UK double instead; allow at least 2.6m x 2.8m for that size.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
Is a UK king Horizon Adventurer 1000 big enough for a couple?
Yes, comfortably for most. You get 75cm each for two people sharing, and because the medium firm feel keeps you on the surface rather than rolling towards the middle, that width feels usable edge to edge. Add the 1000 independent pocket springs and a partner turning over or getting up early is far less likely to wake you.
Will the Horizon Adventurer 1000 in a UK king suit a tall sleeper?
The UK king is 200cm long, or 6ft 6in, which is 10cm longer than the UK double. That gap is the difference between your feet hanging off the end and lying fully stretched out for anyone around the six foot mark. If you need still more width rather than length, the UK super king is the same length but 30cm wider.
What room size do I need for a king size Horizon Adventurer 1000?
We suggest at least 2.7m x 2.9m, which leaves walking room on both sides and space for bedside tables. That's our guidance rather than Horizon's. A new build master bedroom can shrink quickly once fitted wardrobes go in, so measure the usable floor rather than the plan. If the room falls short, the UK double needs at least 2.6m x 2.8m.
Is it worth going from a double to a king for this mattress?
For most couples, yes. The UK king is 15cm wider and 10cm longer than the UK double, and on a medium firm hybrid like this the extra width is genuinely felt, because neither of you sinks into a fixed spot. Given this mattress sits at the affordable end of the hybrid market, the step up is less painful than with many rivals.
Where can I buy the Horizon Adventurer 1000 in a UK king?
Availability shifts, so the most reliable answer is the live comparison table on this page, where prices are updated as retailers change them. Stock and pricing for a UK king can differ from the other sizes of this mattress, so it's worth checking the table rather than assuming the deal on one size applies to another.