Relyon Heyford Ortho 1500 Pocket Mattress
Mattress
Relyon Heyford Ortho 1500 Pocket Mattress
Size
Firmness
Extra Firm
Construction
Depth (cm)
32
Layers
7
Layer Details
- Damask cover. A finely woven damask fabric, which means a soft-touch surface that doesn't trap heat. It's a durable weave built for long-term use.
- Soft white fibres. Two layers of soft white fibres sit just beneath the cover to improve breathability. In practice, this helps the mattress feel fresher through the night.
- Cotton and polyester blend. A breathable blend of natural cotton and polyester that wicks moisture away from you. This keeps air circulating rather than building up warmth.
- Rebound polyester and cotton fibres. A further layer of rebound polyester and cotton fibres adds a touch of comfort. It softens the surface slightly without compromising the firm feel.
- Dense polyester layer. A dense polyester layer that reinforces the firm, orthopaedic character of the mattress. This is where much of the extra firm feel comes from.
- Spring insulation pad. An insulation pad sits between the comfort layers and the springs. It protects the spring unit and adds durability over the years.
- Pocket springs. 1500 pocket springs, each secured in its own fabric pocket so they move independently. That means support tailored to your shape and less disturbance from a restless partner.
Layer details from mattressonline.co.uk product page, September 2026.
- Room to sprawl on a firm surface: At 30cm wider than the UK single, it gives a solo back or front sleeper space to shift position without meeting the edge.
- Fits rooms a double overwhelms: It's 15cm narrower than the UK double, which can be the difference between a door that clears the bed and one that doesn't.
- Independent springs for occasional sharing: The 1500 pocket springs move separately, so when a couple stays over neither sleeper feels every turn the other makes.
- Breathable build in a smaller room: Cotton and polyester layers rather than foam let air move through, useful in the compact bedrooms this size usually lives in.
- Standard 4ft bedding: The small double is a standard UK size, so fitted sheets and frames are easy to find, and a normal double duvet works fine.
This size suits you if...
You sleep alone, prefer a solid orthopaedic feel, and have grown out of a single without having the room for a full double. Or you're furnishing a box room, loft conversion or second bedroom where a 4ft frame is the widest that fits, and any guests will be occasional rather than nightly. Heavier solo sleepers who've been advised to sleep firmer will find the extra width particularly welcome.
Consider another size if...
You share the bed every night, because 120cm is snug for two on a surface this firm. The UK double gives 67.5cm each for two sharing; allow a room of at least 2.6m x 2.8m for it.
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Is a small double big enough for two on the Relyon Heyford Ortho 1500?
For the odd night, yes. The pocket springs respond to each sleeper separately, so occasional sharing works well in a guest room. For every night, though, 120cm is tight, and an extra firm surface leaves nowhere to sink out of each other's way. Nightly couples should look at the UK double, which gives 67.5cm each.
What room size do I need for a small double Heyford Ortho 1500?
We suggest at least 2.4m x 2.8m. That leaves enough clearance to walk round the bed and open the door, which matters in the box rooms and loft conversions this size tends to end up in. Measure the pinch points, sloping ceilings included, before you order.
How much wider is the small double than a single?
The UK small double is 30cm wider than the UK single, and the two are the same length at 190cm. For a teenager who has outgrown a single, or an adult who likes to spread out, that extra width is noticeable without demanding much more floor space.
Does the extra firm feel change in the small double size?
No. The construction is identical across every size, so the extra firm, orthopaedic feel is the same whether you buy the UK small double or the UK super king. What changes is how you use it: at 120cm wide, this one suits a solo sleeper who wants that firmness with room to move.
Where can I buy the Relyon Heyford Ortho 1500 in a small double?
Availability shifts, so the most reliable answer is the live comparison table on this page, which updates as retailers change their prices and stock. Check it for the UK small double specifically, since some retailers list a model in certain sizes only.