Harrison Spinks Platinum 12500 Pocket Mattress (Soft to Medium Feel)
Mattress
Harrison Spinks Platinum 12500 Pocket Mattress (Soft to Medium Feel)
Size
Firmness
Medium Soft
Construction
Depth (cm)
29
Layers
5
Layer Details
- Comfort Layer. Plush British wool sits at the top, which means natural temperature regulation. Wool wicks moisture, so you stay cosy in winter and cooler in summer.
- Comfort Blend. Cotton and wool fibres are blended with hemp and flax. These tougher plant fibres help the comfort layers keep their shape over time.
- Sustainable Layer. A layer of Ecotex fibres made from recycled materials. It's there for strength and durability rather than softness.
- Support System. 10,500 mini springs contour closely to your body, backed by 1,000 Posturfil springs that flex with your movements and weight distribution. This is where the personalised, cradling feel comes from.
- Spring System. At the base, 1,000 Cortec Quad Revolution springs sit in individual pockets, secured in groups of four, with a mini spring inside each one. That layered spring-within-a-spring design gives progressive support as you sink in.
Layer details from mattressonline.co.uk product page, September 2026.
- Fits compact rooms: At 90cm wide it slots into small bedrooms and loft conversions with sloping ceilings, and we suggest allowing at least 2.1m x 2.8m of floor space.
- Full spring count in a small footprint: You get the complete 12,500-spring support system in the single, which means the same close, adaptive contouring a solo sleeper would feel in any larger size.
- Natural fibres for growing sleepers: British wool regulates temperature naturally, which suits children and teens who run warm at night, and the hemp and flax fibres help it last through those years.
- Soft to medium feel for lighter bodies: Lighter sleepers, including most children and teens, often sink too little into firmer mattresses; this gently cushioned surface responds properly to lower body weights.
- Cheap, easy bedding: Single sheets and 135 x 200cm duvets are the most widely stocked and least expensive of any UK size, which keeps running costs down.
- A guest room that impresses: In a spare room that doubles as an office, one well-made single leaves desk space free while still giving visitors a genuinely comfortable night.
This size suits you if...
You're a solo adult who wants a premium natural mattress without paying for width you'll never use, you're buying a long-term bed for a child or teenager and would rather buy once than replace a budget mattress twice, or your spare room needs to hold a proper guest bed alongside a desk and this is the largest size the floor plan allows.
Consider another size if...
You're an adult who shares the bed, even occasionally, or you simply want more room to stretch out. We'd recommend the UK double instead, which is 45cm wider and the same length; allow at least 2.6m x 2.8m of floor space for it.
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Will the Harrison Spinks Platinum 12500 single fit a bunk bed or mid sleeper?
Check your frame's maximum mattress depth first. This mattress is 29cm deep, which is deeper than many bunk and mid-sleeper frames allow, since guard rails need to sit well above the mattress surface. The 90 x 190cm footprint matches standard UK single frames, so width and length are fine; depth is the thing to measure.
Is the Harrison Spinks Platinum 12500 single a good choice for a child?
The soft to medium feel suits lighter bodies well, and the wool, cotton, hemp and flax fillings breathe better than foam, which helps children who overheat at night. It's a considered spend for a child's room, but the durable natural build makes more sense if the bed needs to last into the teenage years.
What room size do I need for a single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single. That leaves enough clearance to walk around the bed and open a wardrobe, even in a child's room where the bed shares space with a desk and toy storage, or in a spare room with a workspace in the corner.
How much smaller is the UK single than the UK small double?
The UK single is 30cm narrower than the UK small double, and the two sizes are the same length at 190cm. If your room can take the extra width, we suggest at least 2.4m x 2.8m of floor space for the UK small double, which gives a solo adult noticeably more room to move.
Where can I buy the Harrison Spinks Platinum 12500 in a UK single?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so it's worth checking back before you buy, as premium pocket spring mattresses like this one do get discounted from time to time.