Harrison Spinks Bronze 3500 Pocket Ortho Mattress (Firmer Feel)
Mattress
Harrison Spinks Bronze 3500 Pocket Ortho Mattress (Firmer Feel)
Size
Firmness
Firm
Construction
Depth (cm)
27
Layers
5
Layer Details
- British wool. A layer of British wool creates a plush, sumptuous sleeping surface. Wool also regulates temperature naturally, which means you're less likely to wake up clammy.
- Cotton, hemp and flax blend. A blend of cotton, hemp and flax wicks moisture away from your body. In practice, that keeps the mattress feeling fresher for longer.
- Hemp and Ecotex fibres. Hard-wearing hemp and strong Ecotex fibres complete the comfort layers. These add durability, which means the surface should hold its shape over time.
- Micro springs. Layers of 2500 micro springs sit beneath the fillings, adding gentle bounce. They adapt to your body, which means a more responsive feel than fillings alone.
- Pocket springs. The base layer holds 1000 Cortec Quad Revolution pocket springs. Each spring moves independently, which means support where you need it and less disturbance from a restless partner.
Layer details from mattressonline.co.uk product page, September 2026.
- 90cm of width each: Two sharers get 90cm apiece, so you can stretch out fully without negotiating over the middle of the bed.
- Pocket springs plus distance: The 1000 Cortec Quad Revolution pocket springs move independently, and at this width your partner's tossing happens a long way from you anyway.
- Room for night-time visitors: If children or a large dog treat your bed as theirs, a super king means everyone keeps a workable share of the surface.
- Firm feel across a wide surface: The firm build resists roll-together, useful on a bed this wide where two sleepers of different weights share one surface.
- Natural fillings that breathe: Wool, cotton, hemp and flax wick moisture, which matters when three bodies and a dog raise the temperature under one duvet.
- Same length as a UK king: The UK super king adds 30cm of width over the UK king but no extra length, so taller sleepers gain elbow room rather than legroom.
This size suits you if...
You share every night and one of you is a genuinely restless sleeper, because no comfort layer beats simple distance. Or your household includes children who wander in at 3am, or a dog with settled bed rights, and you want everyone to fit without anyone perching on an edge. It also suits you if you have a large master bedroom where a UK king would look a little lost.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest as a minimum for this size. The UK king would suit you better: it's 30cm narrower, the same length, and needs only 2.7m x 2.9m by our guidance.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
How big is the Bronze 3500 in a UK super king?
The UK super king measures 180 x 200cm, or 6ft x 6ft 6in in imperial. That works out at 90cm each for two people sharing, the widest and joint-longest size the Bronze 3500 comes in, and the most sleeping space you'll get from a standard UK size.
Is the UK super king Bronze 3500 worth it for couples?
If one of you is restless, yes. The pocket springs already move independently to limit disturbance, but 90cm each adds physical distance on top, which no spring system can replicate. It demands a bigger room and pricier bedding, so it makes most sense where night-time disturbance is a genuine problem.
Will the Bronze 3500 super king fit in my bedroom?
We suggest a minimum room of 3m x 2.9m, with something nearer 3.5m x 3.2m feeling comfortable once you add bedside tables and walking space. That guidance is ours, not the brand's. Measure the room, then check door swing and any tight landing turns, because a 180cm-wide mattress bites at both.
Should I choose the Bronze 3500 in a UK king or a UK super king?
The UK super king is 30cm wider than the UK king and exactly the same length, so the decision is purely about width and room size. If your bedroom comfortably exceeds the 3m x 2.9m we suggest, take the extra width. If it's closer to 2.7m x 2.9m, the UK king is the sensible call.
Is a super king Bronze 3500 good for families sharing with children or pets?
It's the size we'd point families to. When a child pads in at night, or a large dog claims the foot of the bed as routine, 180cm of width means the adults still get a fair share. The firm feel helps too, keeping the surface stable rather than sagging everyone towards the middle.