Harrison Spinks Platinum 12500 Pocket Mattress (Medium Feel)
Mattress
Harrison Spinks Platinum 12500 Pocket Mattress (Medium Feel)
Size
Firmness
Medium
Construction
Depth (cm)
29
Layers
5
Layer Details
- Comfort layer. Layers of plush British wool sit at the top, which means natural temperature regulation. You should feel cosy in winter and refreshed in summer.
- Comfort layer blend. Cotton and wool fibres are blended with hardwearing hemp and flax. These tougher natural fibres help the comfort layers keep their feel for longer.
- Sustainable layer. A layer of Ecotex fibres, made from recycled materials, completes the comfort section. It adds strength and durability rather than softness.
- Support system. Layers of 10,500 mini springs contour to your body for personalised comfort. An additional 1,000 Posturfil springs respond to your movements and weight distribution.
- Spring system. The base uses 1,000 Cortec Quad Revolution springs, each encased in its own pocket and secured into groups of four. Each of these springs contains a mini spring inside it, adding a second stage of response.
Layer details from mattressonline.co.uk product page, September 2026.
- 90cm each for two sharing: Each of you gets 90cm of width, which means you can both stretch out fully without ever meeting in the middle.
- Springs that isolate movement across the full width: The pocketed spring layers respond to weight individually, so at 180cm wide a fidgeting partner is both further away and less noticeable through the mattress.
- Space for the whole household: If children or a large dog treat your bed as their own, this size means everyone still gets a reasonable share of the surface.
- Wool comfort layers over a big surface: The British wool fillings regulate temperature, which matters more when two people, and sometimes more, are sharing one mattress every night.
- 30cm wider than the UK king: It's the same length as the UK king but 30cm wider, and that extra width is the difference between comfortable and genuinely undisturbed sharing.
This size suits you if...
You share every night and want the maximum distance a standard UK size allows, your partner turns over often and you feel every movement on a smaller bed, or your children or pets regularly end up in with you. Your room should be at least 3m x 2.9m, and closer to 3.5m x 3.2m for the bed to sit comfortably with furniture around it.
Consider another size if...
Your bedroom is smaller than 3m x 2.9m, or a bed this wide would dominate the space. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs a room of at least 2.7m x 2.9m.
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Will a UK super king fit in a 3m wide bedroom?
Just about. We suggest a minimum of 3m x 2.9m for a UK super king, which leaves enough clearance to walk round the bed and open drawers. Around 3.5m x 3.2m feels right, giving space for bedside tables on both sides. Measure door swings and any landing turns too, as a 180 x 200cm mattress is awkward on tight stairs.
How much space does each person get on a super king Harrison Spinks Platinum 12500?
90cm each for two people sharing, across the full 180cm width. That's enough to turn over, starfish or sleep at the edge without touching your partner. The mattress's pocketed springs compress under each sleeper independently, so the extra distance and the spring design work together to keep movement on one side from reaching the other.
Is the UK super king worth it over the UK king for this mattress?
If your room takes it, usually yes. The UK super king is 30cm wider than the UK king and the same length, and that width is what makes a restless partner, a wandering child or a dog on the bed manageable rather than annoying. If your room is under 3m x 2.9m, the UK king is the sensible pick.
Is the Harrison Spinks Platinum 12500 super king good for sharing with children?
It's one of the better setups for it. At 180 x 200cm there's room for a small visitor without anyone being pushed to the edge, and the mattress's wool and cotton fillings breathe well when three bodies share the surface. The medium feel suits lighter weights too, though a child in the middle will still notice two heavier adults either side.
Does the medium feel still work for two different sized sleepers at this width?
Better than on a narrower bed. Each sleeper sits over their own section of springs, which compress to individual weight, so a lighter person won't roll towards a heavier partner the way they might on a UK double. Heavier sleepers who want a properly firm surface may still find the soft to medium feel too yielding, whatever the size.