Harrison Spinks Silver 6500 Pocket Mattress (Firmer Feel)
Save with the previous model
Some retailers still sell the earlier version of this mattress. These is where it costs less than the current model's best price.
Mattress
Harrison Spinks Silver 6500 Pocket Mattress (Firmer Feel)
Size
Firmness
Firm
Construction
Pocket Spring
Wool
Natural
Depth (cm)
Layers
5
Layer Details
British wool & viscose blend
The top layer is a blend of British wool and viscose, with a cover that is free of FR chemical treatment. It gives you a natural-fibre surface to sleep on rather than a foam one.
British wool, hemp & flax blend
A layer of British wool, hemp and flax, included for breathability. It should help air move through the mattress, which is useful if you tend to run warm.
Cotton, hemp & flax blend
This layer is designed to wick away moisture and reduce mould and mildew. In practice, that helps keep the inside of the mattress fresher over time.
Pocket springs
Cortec Quad Revolution and Posturfil pocket springs, with mini and micro springs for contouring. The springs work independently, so the support follows the shape of your body.
Sustainable Ecotex base
The base layer is made from recycled fibres, which adds durability. It gives the natural layers above a firm foundation and suits you if recycled materials matter to you.
Layer details from mattressonline.co.uk and thebedshopedinburgh.co.uk product pages, October 2026.
- Distance from a restless partner: With 90cm each for two people sharing, most movement happens too far away to reach you, and the pocket springs compress independently rather than transferring it.
- Room for children or pets: When a child wanders in at 3am or the dog treats the bed as routine, 180cm of width means nobody ends up clinging to an edge.
- A firm feel that holds at this scale: The Firmer Feel build keeps two adults, and any extras, supported across the full width rather than rolling towards a shared dip.
- Fills a larger master properly: In a period property or a big new build master, a UK king can look undersized; the UK super king sits in proportion with the room.
- Matches the standard bedding footprint: At 180 x 200cm it takes standard super king sheets, so upgrading from a UK king means new bedding but no hunting for odd sizes.
This size suits you if...
You share the bed every night with a partner who fidgets, and you want distance to do the work a comfort layer can't. Or your household regularly grows overnight, with children or a large dog joining you, and everyone still needs their share. You'll also want a room of at least 3m x 2.9m and a preference for a firm, supportive surface rather than a soft, cradling one.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest, or the extra width would leave no walking space. The UK king is 30cm narrower and the same length, and needs at least 2.7m x 2.9m; we'd recommend it instead.
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.
Is a super king too big for my bedroom?
It can be. We suggest at least 3m x 2.9m for a UK super king, and closer to 3.5m x 3.2m feels comfortable once you add bedside tables and walking room. Measure the door swing too: at 180cm wide, this mattress needs more clearance to manoeuvre in than smaller sizes.
Is the Silver 6500 super king a good choice for couples?
For couples who like a firm feel, yes. You get 90cm each for two people sharing, and the pocket springs move independently, so a partner turning over is less likely to wake you. Lightweight side sleepers may find the Firmer Feel a little unforgiving at the shoulder and hip, though.
Will the Harrison Spinks Silver 6500 super king get up my stairs?
This is the size where stairs bite. Pocket spring mattresses shouldn't be folded or bent hard, and at 180 x 200cm a tight landing turn or a loft conversion staircase can be a genuine obstacle. Measure the awkward points on the route before ordering, especially any turn narrower than the mattress width.
How much bigger is a super king than a king?
The UK super king is 30cm wider than the UK king, and the two sizes are the same length. That extra width is the whole argument: it's the difference between sharing comfortably and sharing tolerably when a restless partner, a child or a dog is involved. Room-wise, we suggest at least 3m x 2.9m rather than 2.7m x 2.9m.
Should I get a super king if my kids come into bed at night?
It's the size we'd point you to for exactly that. At 180cm wide, a small visitor in the middle still leaves both adults usable space, where a UK double or UK king quickly feels crowded. The firm pocket spring surface also keeps everyone on their own patch rather than rolling together.