Wentworth Mercer Deluxe Naturals 5000 Pocket King Size Mattress
The Wentworth Mercer Deluxe Naturals 5000 is a soft to medium pocket spring mattress with natural wool and cotton fillings, handcrafted in the UK.
- Cool in summer, warm in winter
- Minimises partner disturbance
- Gentle feel suits side sleepers
£1,199
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Wentworth Mercer Deluxe Naturals 5000 Pocket Mattress
More available sizes
Mattress details
Mattress
Wentworth Mercer Deluxe Naturals 5000 Pocket Mattress
Size
Firmness
Medium Soft
Construction
Pocket Spring
Wool
Depth (cm)
29
Layers
4
Layer Details
Wool
Natural wool fibres with temperature regulating properties, which means the mattress helps you stay cool in summer and warm in winter. Wool is a genuinely useful top layer for anyone who runs hot at night.
Cotton
Natural cotton fibres keep the sleeping surface fresh, regulating body temperature and wicking away moisture. In practice, this means a drier, more breathable feel than all-synthetic comfort layers.
Soft White Fibres
Soft synthetic fillings that create a cosy, cushioned feel. They're durable and resilient, so the layer should hold its shape rather than flattening quickly.
Pocket Springs Support System
5000 pocket springs made from twice tempered steel, each encased in its own fabric pocket so it moves independently. That means support that follows your body's shape, with less motion transfer across the bed.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- More room each: At 150 x 200cm, the UK king gives each of you 75cm, which means 7.5cm more per person than the UK double and fewer knees and elbows overnight.
- Length for taller sleepers: The UK king is 10cm longer than the UK double, so a partner well over average height can stretch out without their feet reaching the end.
- Early risers disturb less: The 5000 springs each move on their own, and with 75cm per sleeper there's a little more distance between you when one partner gets up hours earlier.
- Space for extra pillows: The extra width leaves room for a pregnancy pillow or a wedge behind your back without pushing your partner towards the edge of the mattress.
- Less demanding than a super king: The UK king needs noticeably less floor space than the UK super king, so it can suit a master bedroom where wardrobes already take up a wall.
This size suits you if...
You share the bed every night and feel crowded on a UK double, one of you is tall enough for the extra length to matter, or your working hours differ and you'd like more distance between you when one partner gets up in the dark.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m. 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 Deluxe Naturals 5000 UK king long enough for a tall person?
At 200cm, or 6ft 6in, the UK king is 10cm longer than the UK double, the UK small double and the UK single. If one of you regularly finds your feet at the very end of a double, the extra length is often the real reason to upgrade, more than the width.
How much space does each person get on a king size Deluxe Naturals 5000?
Two people sharing the UK king get 75cm each. On the UK double that figure is 67.5cm, so you gain 7.5cm per person. It sounds modest on paper, but it's the difference between brushing against a partner every time you turn and having a little room of your own.
Will I feel my partner move on the Deluxe Naturals 5000 in a UK king?
Less than on a smaller size. The 5000 pocket springs move independently, which limits how far movement travels, and the 75cm each on the UK king adds some physical distance too. A very restless partner may still be noticeable on a soft to medium feel like this one.
Should I get the UK king or UK super king Deluxe Naturals 5000?
The UK super king gives 90cm each, 15cm more per person than the UK king, at the same length. It also needs more room: we suggest at least 3m x 2.9m for the UK super king. If your bedroom is tight, the UK king is the more practical choice for most couples.
What size bedroom do I need for a UK king Deluxe Naturals 5000?
We suggest allowing at least 2.7m x 2.9m, with 3.2m x 3.2m feeling comfortable. New build master bedrooms can seem generous until wardrobes and bedside tables go in, so measure the space left over, including room to walk round both sides of the bed.