MattressNextDay Cashmere Ortho 1000 Pocket British Wool Mattress
Mattress
MattressNextDay Cashmere Ortho 1000 Pocket British Wool Mattress
Size
Firmness
Firm
Construction
Depth (cm)
28
Layers
4
Layer Details
- Silk. Soft in texture and light in weight, silk forms the top comfort layer. It gives the sleep surface a gentle, luxurious feel.
- Cashmere. A rare filling that is softer and finer than wool, typically found in quality mattresses. It adds a touch of plushness above the firmer layers below.
- Authentic Traceable British Wool. This wool is 100% traceable from farm to shop and comes from British Cheviot sheep, known for a strong yet soft fleece. It provides a natural bounce and helps regulate your temperature through the night.
- 1000 Pocket Springs. Each spring sits in its own fabric pocket, so they work completely independently of one another. That means better pressure-relieving support that responds to your body rather than the whole bed moving at once.
Layer details from mattressnextday.co.uk product page, September 2026.
- 90cm each, every night: Two people sharing get 90cm of width apiece, which means you can both change position without ever meeting in the middle.
- Distance plus pocket springs: The 1,000 pocket springs move independently, and at this width your partner's turning happens far enough away that little of it reaches you.
- Firm support across the full 6ft: The firm tension holds steady edge to edge, so a child or dog climbing aboard at 3am doesn't tip everyone towards the dip.
- Wool keeps a big bed temperate: Traceable British wool sits above the springs and regulates temperature, useful when two adults and the occasional visitor share one surface.
- 15cm more each than a UK king: The UK super king is 30cm wider than the UK king, giving each sleeper 15cm more, a difference you feel every night.
This size suits you if...
You share the bed every night and want the most sleeping space a standard UK size offers, your partner is genuinely restless and you'd rather have distance than earplugs, or children and pets treat your bed as their own and you still want a firm, supportive stretch to yourself. A larger master or period bedroom, where a UK king can look a little lost, also makes the case.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest as a minimum, or you sleep alone and don't need 6ft of width. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m and still gives two sharers 75cm each.
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Is the Cashmere Ortho 1000 super king good for restless partners?
Yes, and the size does as much work as the springs. Across 180cm of width you each get 90cm, so most movement happens well away from you, and the 1,000 pocket springs respond individually rather than shifting the whole bed. The firm tension also keeps the surface stable when one of you turns over.
Is the super king Cashmere Ortho 1000 suitable for sharing with children or pets?
It's one of the better setups for it. A UK super king gives two adults 90cm each, so an extra small body leaves everyone a reasonable share, and the firm surface doesn't sag towards whoever is heaviest. The hypoallergenic rating is a modest bonus if a dog joins as routine.
What are the dimensions of the Cashmere Ortho 1000 in a UK super king?
It measures 180 x 200cm, or 6ft x 6ft 6in. That's 30cm wider than the UK king and the same length, so you gain width rather than legroom. Standard super king sheets and a 260 x 220cm duvet fit it.
What room size do I need for this mattress in a super king?
We suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling more comfortable once you add bedside tables and walking space. If your room is smaller, the UK king needs at least 2.7m x 2.9m and may sit better, particularly in a loft room where a sloped ceiling limits which wall the bed can take.
Will a super king feel too firm for one lighter sleeper on a shared bed?
Possibly. The firm tension suits back and front sleepers, but a lightweight side sleeper may find it a little unyielding at the shoulders and hips, and that doesn't change with size. What the UK super king does offer is space to spread out, which lets each of you settle into your preferred position without compromise. Compare the retailers listed on this page for current pricing.