Horizon Odyssey 800 Pocket Memory Mattress
Mattress
Horizon Odyssey 800 Pocket Memory Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
23
Layers
2
Layer Details
- Memory Foam. A 2cm memory layer that contours to your body for personalised comfort and helps relieve pressure on joints, back and hips. It's a cooling layer too, which matters if you tend to sleep warm.
- Pocket Springs. 800 individual pocket springs that move independently, which means support tailored to where your body needs it and no motion transfer. In practice, you're less likely to feel a partner turning over.
Layer details from mattressonline.co.uk product page, September 2026.
- Proper space for two: At 75cm each for two people sharing, you can both change position without negotiating territory in the middle of the night.
- Less disturbance on different schedules: The 800 pocket springs move independently, which means an early alarm and a quiet exit on one side is far less likely to wake the other.
- Extra length for taller sleepers: The UK king is 10cm longer than the UK double at 200cm, so a partner nudging six foot stops sleeping with their feet at the edge.
- Pressure relief across the full width: The graphite-infused memory foam layer contours wherever you settle, useful when a dog or a wandering partner pushes you towards the edge.
- A sensible room fit: We suggest a bedroom of at least 2.7m x 2.9m, which many UK master bedrooms can manage where a UK super king would feel cramped.
This size suits you if...
You share the bed every night and the double has started to feel like a compromise, especially if one of you gets up hours before the other. It also makes sense if one partner is approaching six foot and keeps running out of mattress, or if a dog has quietly become a permanent third occupant and you need the width back.
Consider another size if...
Your bedroom falls short of the 2.7m x 2.9m we suggest for a UK king, or you sleep alone. We'd recommend the UK double instead, which needs a slightly smaller room at 2.6m x 2.8m.
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How much space does each person get on a UK king Horizon Odyssey 800?
You get 75cm each for two people sharing, across the mattress's 150cm width. In practice that means room to sleep on your back or spread out a little without touching, and the 800 pocket springs keep movement on one side from travelling to the other.
Will the Horizon Odyssey 800 UK king fit in my bedroom?
The mattress measures 150 x 200cm, and we suggest a room of at least 2.7m x 2.9m so you can walk round the bed and open drawers comfortably. New build master bedrooms often look generous until the wardrobes go in, so measure the clear floor space rather than the room itself.
Is the UK king Horizon Odyssey 800 long enough for tall sleepers?
At 200cm long, the UK king is 10cm longer than the UK double, which matters once someone passes about six foot. If length is your main reason for upgrading, this size delivers it; sizing up further to the UK super king adds width only, as the two sizes are the same length.
Should I choose the Horizon Odyssey 800 in a UK king or UK super king?
The UK king is 30cm narrower than the UK super king and both are the same length. If your room meets the 3m x 2.9m we suggest for the UK super king and you want maximum space, size up. For most couples the UK king is the better balance of space and room fit.
Is a UK king worth it over a double for this mattress?
The UK king is 15cm wider and 10cm longer than the UK double. Paired with this mattress's independent pocket springs, that extra width means a partner turning over or leaving early is less likely to disturb you. Compare the retailers listed on this page to see current pricing for both sizes.