Jay Be Benchmark S1 Comfort Eco Friendly King Size Mattress
The Jay Be Benchmark S1 Comfort Eco Friendly is a firm hybrid mattress at 18cm deep, which is slimmer than many hybrids, so it sits lower on the bed frame and is lighter to move.
- Firm support for back & front sleepers
- Hybrid build for better airflow
- Suits bunks, guest beds & daybeds
£198.60
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Jay Be Benchmark S1 Comfort Eco Friendly Mattress
More available sizes
Mattress details
Mattress
Jay Be Benchmark S1 Comfort Eco Friendly Mattress
Size
Firmness
Firm
Construction
Foam
Hybrid
Rolled
Open Coil Spring
Eco-Friendly
Depth (cm)
18
Layers
3
Layer Details
Advanced e-Fibre
A super soft top layer that's described as award-winning for luxury comfort and breathability. It gives the firm mattress a softer surface to lie on, with airflow built in.
Rebound e-Fibre
A cushioning layer that provides contour support. It sits beneath the top layer and helps the surface follow your shape a little, so the firm feel isn't completely unyielding.
e-Spring core
A deep e-Spring core forms the base of the mattress. It provides the supportive foundation behind the firm feel, and the construction is foam-free.
Layer details from mattressman.co.uk and furniturevillage.co.uk product pages, October 2026.
Key benefits
- 75cm of space each: Two people sharing get 75cm each, which means fewer accidental elbows and less disturbance when one of you gets up hours before the other.
- Extra length for taller sleepers: At 200cm long, it's 10cm longer than the UK double, so anyone approaching six foot stops sleeping with their feet at the edge.
- Firm support across the full width: The firm hybrid build holds a flat, no-sink surface right across 150cm, useful if one of you is heavier or you both sleep on your back.
- Slim 18cm profile, easier to handle: A king mattress can be awkward on the stairs, but at 18cm deep this one is lighter and slimmer than most hybrids this size.
- A big size without a big spend: King is where prices usually jump, so a firm hybrid at the budget end makes the upgrade from a double more affordable than most.
This size suits you if...
You share the bed every night and a double has started to feel cramped, especially if one of you is up early or shifting position through the night. It also fits if either of you is tall enough to want the 200cm length, or you prefer a firm, supportive surface and want the biggest size this mattress is made in.
Consider another size if...
Your bedroom can't comfortably take a king; we suggest at least 2.7m x 2.9m. In a smaller room, the UK double would suit you better, and we suggest at least 2.6m x 2.8m for that size.
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FAQ's
Is the Jay Be Benchmark S1 in a UK king good for couples?
Yes, and it's arguably the size this mattress makes most sense in for two. You get 75cm each for two people sharing, and the firm hybrid construction keeps the surface stable, so one person turning over transfers less movement than a soft budget mattress would. Lightweight side sleepers may still find the firm feel presses on shoulders and hips.
What room size do I need for the UK king Benchmark S1?
We suggest at least 2.7m x 2.9m, with around 3.2m x 3.2m feeling comfortable. That's our guidance rather than the manufacturer's, and it assumes you want to walk round both sides and open drawers without shuffling sideways. New build master bedrooms often shrink once wardrobes go in, so measure the usable floor, not the whole room.
Is the UK king long enough for someone over six foot?
At 200cm, the UK king is 10cm longer than the UK double, and for a taller sleeper that length is often the real upgrade rather than the width. If one of you is over six foot and currently sleeping diagonally or with feet overhanging, this size solves it without needing a wider room.
Does the Jay Be Benchmark S1 come in a super king?
No. The UK king, at 150 x 200cm, is the largest size this mattress is made in. If you need super king width, you'd have to look at a different model. For most couples upgrading from a double, though, the king's 75cm each is a noticeable improvement on its own.
How heavy is the king size to move upstairs?
JAY-BE doesn't publish a weight for this mattress, so we can't give you a figure. That said, at 18cm deep it's slimmer than many hybrids, which makes a king easier to angle round a landing than a deeper mattress of the same width. Two people is still sensible for any 150cm mattress.