Harrison Spinks Bronze 3500 Pocket Ortho King Size Mattress (Medium Feel)
The Harrison Spinks Bronze 3500 is a pocket spring mattress handcrafted in the UK, with a soft to medium feel in this variant.
- Natural fillings keep hot sleepers cool
- Micro springs adapt to your shape
- Cover made without FR chemicals
£1,179
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Harrison Spinks Bronze 3500 Pocket Ortho Mattress (Medium Feel)
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Mattress details
Mattress
Harrison Spinks Bronze 3500 Pocket Ortho Mattress (Medium Feel)
Size
Firmness
Medium
Construction
Pocket Spring
Wool
Natural
Depth (cm)
27
Layers
6
Layer Details
Cover
An in-house woven cover made without FR chemicals, meeting fire safety standards naturally. That means a healthier sleep environment without chemical treatments.
Wool
A layer of British wool gives a plush, sumptuous sleeping surface. Wool also regulates temperature well, which helps if you tend to sleep warm.
Cotton, Hemp and Flax blend
This blended layer wicks away moisture, which means the surface stays feeling fresher through the night.
Hemp and Ecotex
Hemp and strong Ecotex fibres complete the comfort layers, adding durability and structure beneath the softer fillings.
Micro springs
Layers of 2500 micro springs sit beneath the fillings, providing extra bounce that adapts to your body shape.
Pocket Springs
The base layer holds 1000 Cortec™ Quad Revolution® pocket springs, with each dual spring in a cloth pocket and secured in groups of four. This gives independent, targeted support and helps limit partner disturbance.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- 75cm each for couples: Two sharers get 75cm of width each, which means you can change position without negotiating for space at 3am.
- Springs that keep movement local: Each Cortec pocket spring sits in its own cloth pocket, so one partner getting up early is felt less on the other side.
- Length for taller sleepers: At 200cm long, the UK king is 10cm longer than the UK double, a real difference for anyone approaching 6ft.
- Natural fillings across a wider surface: British wool, cotton, hemp and flax wick moisture across the full 150cm width, helpful when two warm bodies share one bed.
- A soft to medium feel to share: The soft to medium surface suits side sleepers well, though heavier partners may find it a little forgiving at this size.
This size suits you if...
You share the bed every night and a double now feels cramped, especially if one of you gets up hours before the other. It also suits couples where one partner is approaching 6ft, since the extra 10cm of length matters more than you'd expect. If either of you tends to sleep warm, the wool and cotton fillings should help across a shared surface.
Consider another size if...
Your bedroom is under our suggested 2.7m x 2.9m minimum, or you sleep alone. In a smaller room, we'd recommend the UK double instead, which needs at least 2.6m x 2.8m. Couples with the space who want maximum spread should consider the UK super king.
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FAQ's
How big is the Harrison Spinks Bronze 3500 in a UK king?
It measures 150 x 200cm, or 5ft x 6ft 6in. That gives two people sharing 75cm of width each, and the 200cm length gives taller sleepers room to stretch out without their feet reaching the end of the mattress.
Is the UK king Bronze 3500 good for couples who disturb each other?
Yes, this size plays to the mattress's strengths. The 1000 pocket springs are individually pocketed and secured in groups of four, which limits how far movement travels, and the 75cm each of width means you're less likely to bump into each other in the first place.
What room size do I need for the Bronze 3500 in a UK king?
We suggest a room of at least 2.7m x 2.9m, with around 3.2m x 3.2m feeling genuinely comfortable. Remember to measure with wardrobes and bedside tables in place; a new build master bedroom can shrink quickly once the furniture goes in.
Should a taller sleeper choose the UK king over the UK double?
Usually, yes. The UK king is 10cm longer than the UK double as well as 15cm wider, and if you're approaching 6ft that extra length is often the upgrade you'll notice most. The soft to medium feel stays the same across both sizes.
Is the soft to medium feel right for two sharers of different weights?
For most couples, yes, since the micro springs adapt to each body independently. If one partner is heavier and sleeps on their back or front, they may want more pushback than this soft to medium variant gives, so it's worth them trying the firmer options in the range.