Harrison Spinks Bronze 3500 Pocket Ortho Mattress (Soft to Medium Feel)
Mattress
Harrison Spinks Bronze 3500 Pocket Ortho Mattress (Soft to Medium Feel)
Size
Firmness
Medium Soft
Construction
Depth (cm)
27
Layers
6
Layer Details
- Cover. An in-house woven cover that meets fire safety standards without FR chemicals, which means fewer additives next to your skin. A small but genuine plus for anyone conscious of what goes into their bedding.
- Wool comfort layer. A layer of British wool sits near the surface, giving that plush, sumptuous first impression when you lie down. Wool also handles temperature well, so it stays comfortable through the night.
- Blend comfort layer. A blend of cotton, hemp and flax wicks moisture away from you as you sleep. In practice that means a fresher, drier feel, particularly useful if you run warm.
- Hemp and Ecotex layer. Layers of hardwearing hemp and strong Ecotex fibres add structure to the mattress. This helps reduce dips forming in the surface over time.
- Micro springs. A layer of 2500 micro springs provides additional bounce that adapts to your body. These respond quickly as you move, so changing position feels easy rather than effortful.
- Pocket springs support system. The base is 1000 Cortec Quad Revolution pocket springs, each with a smaller support spring nested inside a larger comfort spring, wrapped in a cloth pocket and secured in groups of four. The result is a softer initial feel backed by deeper support when you need it.
Layer details from mattressonline.co.uk product page, September 2026.
- A gentle feel for lighter bodies: The soft to medium tension suits the lighter weights typical of single-bed sleepers, so children and teens get cushioning rather than a surface that feels like a board.
- Full spring count in a small footprint: You get the same 3500-spring construction as the larger sizes, which means a solo sleeper isn't getting a cut-down version of the mattress.
- Breathable fillings for small rooms: Wool, cotton, hemp and flax wick moisture and manage temperature, useful in compact bedrooms and loft rooms that warm up quickly.
- Leaves the floor free: At 90cm wide, it leaves space for a desk, wardrobe and toy storage in a child's room, or a second bed in a shared one.
- Cheap, easy bedding: Standard single sheets and a single duvet fit, the most widely stocked and least expensive bedding of any UK size.
This size suits you if...
You're buying for one sleeper who likes a softer, springy feel: a child moving up from a cot bed, a teenager, or a solo adult in a compact room. It also suits a spare room or study that doubles as guest space, where a 90cm-wide bed keeps the rest of the room usable. Just check the sleeper doesn't prefer a firm mattress, because this one is deliberately gentle.
Consider another size if...
You're an adult who wants room to stretch out, or you share the bed even occasionally. We'd recommend the UK small double instead: it's 30cm wider than the UK single, the same length, and we suggest at least 2.4m x 2.8m of floor space for it.
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Is the Bronze 3500 in a UK single a good mattress for a child?
Yes, with one caveat. The soft to medium feel suits lighter bodies well, so a child or teen gets proper cushioning from the wool comfort layer rather than lying on top of a surface too firm to respond to them. The natural fillings also breathe well. If your child strongly prefers a firm feel, look elsewhere.
Will the Bronze 3500 single fit a bunk bed or mid sleeper?
Check your frame first. This mattress is 27cm deep, and many bunk and mid sleeper frames specify a maximum depth so the guard rail still sits safely above the mattress surface. The 90 x 190cm footprint matches standard UK single frames, so width and length are rarely the problem; depth is the thing to measure.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single, which gives you room to walk around the bed and open drawers or wardrobe doors. That makes it a realistic fit for box rooms, loft conversions with a narrow usable strip, and children's rooms where the bed competes with a desk and storage.
Should I buy the Bronze 3500 in a UK single or a UK small double?
For a child or a genuinely small room, the UK single is the sensible pick. For an adult sleeping alone with a bit more space, the UK small double is 30cm wider and the same length, so you gain spreading-out room without needing a longer bed. We suggest at least 2.4m x 2.8m of floor space for the UK small double.
Where can I buy the Harrison Spinks Bronze 3500 in a UK single?
Compare the retailers listed on this page. The prices shown here are live and updated as retailers change them, so it's worth checking back if you're not buying immediately. Availability can differ by size, which is why the UK single has its own listing rather than sharing one with the larger sizes.