Harrison Spinks Emerald 16500 Pocket Super King Mattress (Medium Feel)
The Harrison Spinks Emerald 16500 is a pocket spring mattress with 16,500 springs in total, handcrafted in the UK and filled with natural fibres including British wool, cotton, hemp and flax.
- Support adjusts to your weight & shape
- Winter & summer sides to flip
- Natural fillings, no memory foam
£2,779
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Harrison Spinks Emerald 16500 Pocket Mattress (Medium Feel)
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Mattress details
Mattress
Harrison Spinks Emerald 16500 Pocket Mattress (Medium Feel)
Size
Firmness
Medium
Construction
Pocket Spring
Wool
Natural
Depth (cm)
29
Layers
3
Layer Details
Comfort fillings
Layers of natural British wool, cotton, hemp and flax fibres sit at the sleep surface. One side places wool closer to the top for winter warmth, while the other includes moisture-wicking cotton for summer freshness, so you flip the mattress with the seasons.
Mini Pocket Springs
A layer of 15,800 mini springs delivers bouncy comfort, with the small pockets creating airflow throughout the mattress. They reach areas that broader springs can miss, such as the hips and lower spine.
Support System
At the base, 700 Cortec™ Quad springs are encased in cloth pockets and secured into groups of four. They're highly responsive, providing support based on your unique weight, shape and movement.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- 90cm each for two sharing: Each of you gets 90cm of width, which means one person turning over on 16,500 springs barely registers on the other side.
- Distance beats any comfort layer: Pocket springs already isolate movement well, but at this width a genuinely restless partner is simply too far away to disturb you.
- Space for night-time visitors: If children or a large dog treat your bed as theirs, the extra 30cm over a UK king keeps everyone with a fair share of the surface.
- Suits a large master bedroom: In a period property or generous new build master, a smaller bed can look lost, while the 180cm frame fills the room properly.
- Seasonal sides across a big surface: The dual-sided wool and cotton design still applies at this size, although flipping a 180 x 200cm mattress is a two-person job.
This size suits you if...
You share the bed every night and one of you sleeps restlessly, so distance matters as much as spring count. You have a large master bedroom, ideally around 3.5m x 3.2m, where a UK king would look undersized. Or your household includes children or a big dog who join you regularly and you'd rather plan for that than fight it.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest, or your stairs and landing have a tight turn. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs at least 2.7m x 2.9m.
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FAQ's
What size room do I need for a super king Harrison Spinks Emerald 16500?
We suggest a minimum of 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable once wardrobes and bedside tables are in. Measure door swing and the walking route around the bed too. If your room is smaller, the UK king takes 2.7m x 2.9m and gives up only 30cm of width.
Will the Emerald 16500 super king fit up my stairs?
It's a 180 x 200cm mattress that's 29cm deep and pocket sprung, so it can't be rolled or bent around a tight landing. Measure your stairwell, any turns and the bedroom doorway before ordering, and check the retailer's delivery access guidance if your staircase is narrow or winding.
Is the super king Emerald 16500 good for restless couples?
Yes, arguably the best size for the job. The 15,800 mini springs and 700 Cortec Quad springs respond to each sleeper individually, and with 90cm of width apiece you're far enough apart that most movement never reaches you. A partner who tosses and turns is the strongest reason to size up to it.
How does the super king compare to the UK king in this mattress?
The UK super king is 30cm wider than the UK king, and the two are the same length at 200cm. The construction, medium feel and dual seasonal sides are identical, so the decision comes down to floor space: allow at least 2.7m x 2.9m for the UK king and 3m x 2.9m for the UK super king.
Is a super king worth it if children share the bed?
If little ones wander in most nights, the extra width is the difference between everyone sleeping and nobody sleeping. At 180cm across, a child between you still leaves each adult reasonable space, and the springs' individual response means their wriggling stays largely on their patch. Compare the retailers listed on this page for current pricing.