Wentworth Mercer Natural Pocket 1500 Super King Mattress
The Wentworth Mercer Natural Pocket 1500 is a medium to firm pocket spring mattress, handcrafted in the UK.
- Minimises partner disturbance
- Cotton wicks away moisture
- Holds its shape without dips
£644
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Wentworth Mercer Natural Pocket 1500 Mattress
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Mattress details
Mattress
Wentworth Mercer Natural Pocket 1500 Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Wool
Natural
Depth (cm)
29
Layers
3
Layer Details
Cotton and Polyester Blend
Two layers blending cotton and polyester fibres, which means cushioned comfort where your body meets the mattress. The cotton wicks away moisture while the polyester increases airflow, helping you stay cooler through the night.
Soft White Fibres
Two layers of soft white fibres that enhance breathability and add durability. In practice, this helps the mattress hold its shape rather than developing dips over time.
Pocket Springs
1500 responsive pocket springs, each sewn into its own fabric pocket before being bonded together, so they can move individually as well as working as a team. This means the springs follow your shape and limit motion transfer from a restless partner.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- 90cm each for two: Sharing the UK super king gives each of you 90cm, which means you can shift position at night without ending up on your partner's side.
- Distance plus independent springs: The 1500 individually pocketed springs limit movement travelling across the bed, and the extra width puts real distance between you and a partner who fidgets.
- Room when the household piles in: If children or a large dog join you most nights, the UK super king leaves the adults with a usable share instead of a narrow strip at the edge.
- Longer than a double: At 6ft 6in long, the UK super king is 10cm longer than the UK double, a small difference that taller sleepers tend to notice at their feet.
- Suits a generous bedroom: In a large master or a high-ceilinged period room, a UK super king fills the space in proportion where a smaller bed can look a little lost.
This size suits you if...
You share with a partner who tosses and turns, or your bed regularly fills up with young children or a large dog, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is smaller than 3m x 2.9m, or door swing and walkway space are already tight. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
Natural Pocket 1500 super king or king for a couple?
The UK super king is 30cm wider than the UK king and the same length, giving each of you 15cm more width. If one of you moves a lot in the night, that extra 15cm helps. Check your room first: we suggest at least 3m x 2.9m for the UK super king and 2.7m x 2.9m for the UK king.
Is a super king Natural Pocket 1500 big enough for two adults and a child?
Two adults get 90cm each on this 180cm wide mattress, so a small child in the middle eats into both shares rather than leaving one person squeezed. It is the most room this mattress offers. If a child joins you most nights, the UK super king is the size to choose.
Will a restless partner wake me on a super king pocket spring mattress?
Two things help here. The 1500 pocket springs move independently, so movement on one side travels less across the surface. The UK super king also puts 90cm of width on each side, which keeps you physically further apart. A very restless partner may still be felt at times, but far less than on a smaller bed.
How much bigger is the Natural Pocket 1500 super king than the double?
The UK super king is 45cm wider and 10cm longer than the UK double. For two people sharing, the UK double gives 67.5cm each, so the UK super king gives 22.5cm more each. It needs a larger room: we suggest at least 3m x 2.9m for the UK super king and 2.6m x 2.8m for the UK double.
Can a super king mattress work in a loft conversion bedroom?
It can, provided the room clears our suggested minimum of 3m x 2.9m where you have full head height. A sloping ceiling usually decides which wall the headboard goes against, so measure the flat floor area rather than the whole room. If the usable space falls short, the UK king at 2.7m x 2.9m is the better fit.