Simba Hybrid Ultra King Size Mattress
The Simba Hybrid Ultra sits at the top of Simba's range, a 34cm deep hybrid built from eleven layers combining natural materials with Simba's own technology.
- Deep build cushions pressure points
- Eleven layers of natural materials
- Suits back & combination sleepers
£1,741
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Simba Hybrid Ultra Mattress
More available sizes
Mattress details
Mattress
Simba Hybrid Ultra Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Depth (cm)
34
Layers
Layer Details
Construction
Simba describes the Hybrid Ultra as eleven layers of natural materials paired with its most advanced signature tech. The brand doesn't break down each layer individually on its page, but the overall build comes to a substantial 34cm depth.
Layer details from simbasleep.com product page, September 2026.
Key benefits
- Proper space for two: At 75cm each for two people sharing, you can turn over without negotiating, which suits couples who found a double a little cramped.
- Less partner disturbance: The deep hybrid construction absorbs movement, and the UK king's width adds distance between you, so an early alarm on one side travels less.
- Length for taller sleepers: At 200cm long, or 6ft 6in in old money, anyone approaching six foot gets their feet on the mattress rather than off the end.
- A sensible step up: The UK king is 15cm wider than the UK double, a difference you feel nightly, without demanding the floor space a UK super king needs.
- Room to shift position: If one of you props pillows, sleeps propped up during pregnancy, or changes position through the night, the extra width means the other isn't squeezed to the edge.
This size suits you if...
You share the bed every night and a double has started to feel tight, one of you gets up hours before the other and you want movement to go unnoticed, or someone in the bed is nudging six foot and needs the 200cm length as much as the width.
Consider another size if...
Your bedroom falls short of the 2.7m x 2.9m we suggest as a minimum for a king. In that case the UK double would suit you better, keeping walkway space around the bed once wardrobes are in.
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.
FAQ's
Is the Simba Hybrid Ultra UK king big enough for a couple?
Yes, comfortably for most. You get 75cm each for two people sharing, noticeably more personal space than a double offers. If a dog joins you most nights, or one of you sprawls, that margin is the difference between sleeping well and clinging to an edge.
Will a UK king Simba Hybrid Ultra fit in my bedroom?
The mattress itself is 150 x 200cm. For the room, we suggest at least 2.7m x 2.9m, with 3.2m x 3.2m comfortable. New build master bedrooms can shrink fast once wardrobes go in, so measure the usable floor, including door swing, before committing.
Is the UK king long enough for someone over six foot?
At 200cm, or 6ft 6in, it gives 10cm more length than a UK double. That covers most people around the six foot mark with room to spare. If someone in the bed is well past six foot, the UK super king matches the length but adds width.
Should I choose the UK king or the UK super king?
The UK king is 30cm narrower than the UK super king, both share the same 200cm length. If your room clears 2.7m x 2.9m but is short of super king territory, the UK king is the sensible pick. If space is genuinely no object and you both spread out, size up.
What sheets fit the Simba Hybrid Ultra in a UK king?
Standard UK king fitted sheets for the 150 x 200cm footprint, but check the depth: at 34cm this is a notably deep mattress, so you'll need extra deep fitted sheets rather than regular ones. A 230 x 220cm king duvet is the usual pairing.