Wentworth Mercer Premium Silk 11000 Pocket King Size Mattress
The Wentworth Mercer Premium Silk 11000 is a pocket spring mattress with natural fillings: silk, wool, cotton and cashgora sit above two layers of springs, 11,000 in total.
- Eases pressure at shoulders & hips
- Cooler in summer, warmer in winter
- Minimises partner disturbance
£1,969
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Wentworth Mercer Premium Silk 11000 Pocket Mattress
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Mattress details
Mattress
Wentworth Mercer Premium Silk 11000 Pocket Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Wool
Natural
Depth (cm)
28
Layers
6
Layer Details
Silk
A luxurious natural fibre that gives the sleep surface a sumptuous, breathable feel. It stays resilient over time rather than flattening quickly.
Wool
Wool is a natural insulator with good temperature regulation, which means it helps keep you comfortable all year round. Cosy in winter, breathable in summer.
Cotton
Natural cotton fibres wick moisture away from your body and help regulate temperature. The result is a fresher-feeling sleep surface, especially if you run warm.
Soft White Fibres
Soft synthetic fillings add a cosy, cushioned feel to the comfort layers. They are durable and hold their shape well.
Mini Pocket Springs
Small individually cased springs sit near the surface for added comfort and gentle pressure relief. They also cut down motion transfer, so you feel less of a partner's movement.
Pocket Springs
The main support layer: individual springs encased in cloth pockets that respond to each part of your body separately. That means more tailored support along your spine than a traditional open-coil system gives.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Room for two adults: At 75cm each for two people sharing, you get 7.5cm more personal space than on a UK double, which means fewer nudged elbows during the night.
- Extra length for tall sleepers: The UK king measures 5ft x 6ft 6in, 10cm longer than a UK double, so a partner over six foot is less likely to find their feet at the edge.
- Less disturbance from early risers: Mini pocket springs sit above the main springs and limit how far movement spreads, which suits couples where one person gets up hours before the other.
- Space to shift position: The extra width gives you room for a pregnancy pillow or a change of position without taking over your partner's half of the bed.
- A step up that still fits most rooms: You gain real space over a UK double without needing a room as large as the at least 3m x 2.9m we suggest for a UK super king.
This size suits you if...
You share the bed every night and a UK double has started to feel tight, or one of you is over six foot and needs more length, or you keep different hours and want to feel less of each other getting in and out.
Consider another size if...
Your bedroom falls short of our suggested 2.7m x 2.9m once the furniture is in. We'd recommend the UK double instead, for which we suggest at least 2.6m x 2.8m.
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FAQ's
Is the Wentworth Mercer Premium Silk 11000 UK king big enough for two adults?
For most couples, yes. The UK king gives you 75cm each, which is 7.5cm more per person than a UK double. You will notice it most if one of you sprawls or sleeps with an arm out. If you want even more room, the UK super king gives 90cm each.
Will a UK king Wentworth Mercer Premium Silk 11000 suit someone over six foot?
The UK king is 200cm long, or 6ft 6in, which is 10cm longer than a UK double. For a tall partner that extra length usually matters more than the extra width, because it means their feet are less likely to hang over the end.
Does a UK king help with partner disturbance on the Wentworth Mercer Premium Silk 11000?
It should help in two ways. Each of you gets 75cm, so there is more distance between you, and the mini pocket springs near the surface limit how far movement travels. Couples on different schedules often find the combination useful, although a very restless partner will still be felt a little.
Should we choose the UK king or UK super king Wentworth Mercer Premium Silk 11000?
The UK king gives you 15cm less each than the UK super king, but both are the same length. If your room comfortably meets the at least 3m x 2.9m we suggest for a UK super king, the extra width is worth considering. Otherwise the UK king is the more practical choice.
Will a UK king Wentworth Mercer mattress fit a new build master bedroom?
New build master bedrooms often feel smaller once the wardrobes go in, so measure the free floor space rather than the whole room. We suggest at least 2.7m x 2.9m for a UK king, and 3.2m x 3.2m gives you comfortable room to walk around it.