Aspire Natural Cashmere 1000 Pocket King Size Mattress
The Aspire Natural Cashmere 1000 Pocket Mattress pairs natural fillings, cashmere and wool, with 1,000 pocket springs (counted on the kingsize) for a medium feel.
- Natural cashmere & wool fillings
- Stays cooler & drier on warm nights
- Support that follows your shape
£375
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Aspire Natural Cashmere 1000 Pocket Mattress
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Mattress details
Mattress
Aspire Natural Cashmere 1000 Pocket Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Wool
Natural
Depth (cm)
28
Layers
4
Layer Details
Cashmere
A luxuriously soft natural filling that sits at the top of the mattress. It's highly breathable with good moisture-wicking properties, which means the sleep surface should stay drier and cooler through the night.
Wool
A natural insulator with strong temperature-regulating properties. In practice, it helps keep you warm in winter and stops heat building up in summer.
Recycled polyester fibres
A layer of recycled polyester fibres that boosts the softness and comfort of the mattress. It adds a little extra cushioning between the natural fillings and the springs.
Pocket Springs
1,000 individual pocket springs, a count based on the kingsize, each responding separately to pressure. That means individualised support for your sleep posture, which can help relieve aches and pains.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- 75cm each for two sharing: With 75cm of width per person, you can both change position freely, which makes a real difference if one of you is a restless sleeper.
- The full 1,000 springs: Aspire counts the 1,000 pocket springs on the kingsize, so this size carries the complete spring count rather than a scaled-down version.
- Less partner disturbance: Each spring compresses independently, which means an early alarm and a quiet exit on one side transfers far less movement to the other.
- 200cm of length: The UK king is 10cm longer than the UK double, welcome breathing room for anyone approaching six foot who currently sleeps diagonally.
- Natural fillings across a wider surface: Cashmere and wool regulate temperature across the whole 150cm width, useful when two bodies are generating heat under one duvet.
This size suits you if...
You share the bed every night and a double has started to feel cramped, especially if one of you gets up hours before the other and you'd rather not feel every movement. It also suits couples where one partner is tall, since the 200cm length removes the feet-off-the-end problem, or households where a dog has quietly claimed a corner of the mattress as its own.
Consider another size if...
Your bedroom is under our suggested minimum of 2.7m x 2.9m, or you mostly sleep alone. We'd recommend the UK double instead, which needs a slightly smaller room at around 2.6m x 2.8m by our guidance.
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FAQ's
Is a UK king big enough for a couple on this mattress?
Comfortably, for most couples. The UK king gives 75cm of width each for two people sharing, and the 1,000 pocket springs respond to each sleeper separately, so you feel less of your partner's movement. If one of you spreads out or a pet joins you regularly, the UK super king adds 30cm of width.
How much bigger is the UK king than a double for this Aspire mattress?
The UK king is 15cm wider and 10cm longer than the UK double. The width is the difference you notice night to night when sharing, while the extra length helps taller sleepers. You'll need a slightly larger room too: we suggest at least 2.7m x 2.9m for a UK king.
Does the spring count change in the king size?
No, and this size is the reference point: Aspire counts the 1,000 pocket springs on the kingsize. So the UK king carries exactly the spring count the mattress is named for, spread across a 150 x 200cm surface, with each spring compressing independently under whoever is lying on it.
What room size does the Aspire Natural Cashmere need in a UK king?
We suggest a room of at least 2.7m x 2.9m, with around 3.2m x 3.2m feeling comfortable once wardrobes and bedside tables are in. This is our guidance rather than Aspire's. In a compact new build master, measure carefully before committing; if it's tight, the UK double suits rooms from about 2.6m x 2.8m.
Is the UK king long enough for someone over six foot?
At 200cm, or 5ft x 6ft 6in in imperial terms, the UK king suits most people over six foot with room to spare. That's 10cm more length than the UK double, which is often the upgrade taller sleepers actually need. Sizing up to the UK super king adds width, not length: both sizes are the same length.