Sealy Ortho Plus Essential Single Mattress
The Sealy Ortho Plus Essential is a medium firm sprung mattress from a long-established brand.
- Firm-leaning support
- Twice-tempered springs resist dipping
- Damask cover lets air move through
£299
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Sealy Ortho Plus Essential Mattress
More available sizes
Mattress details
Mattress
Sealy Ortho Plus Essential Mattress
Size
Firmness
Medium Firm
Construction
Foam
Memory Foam
Orthopaedic
Open Coil Spring
Depth (cm)
27
Layers
3
Layer Details
Damask Cover
A cover made from breathable Belgian damask fabric, which means air can move through the sleep surface rather than getting trapped against you. It gives a traditional, tailored finish.
Soft White Fibres
Soft fibre fillings made from 100% polyester sit above the springs. They add a slightly softer initial feel before you reach the firmer support beneath.
PostureTech CS Springs
These springs respond to your body weight to provide deep down support, so heavier areas like hips and shoulders get pushed back where needed. They are twice tempered, which means the steel is treated to stay resilient over time.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Leaves room for everything else: At 90cm wide, it keeps floor space free in a child's room where the bed competes with a desk, wardrobe and toy storage.
- Firm support for growing sleepers: The PostureTech CS springs respond to body weight, which means lighter children and teens get steady, even support rather than sinking into soft foam.
- Built to last the school years: Twice-tempered springs are treated to keep their resilience, useful in a size that often serves one child from primary school through the teens.
- A sensible guest bed: The simple sprung construction gives occasional guests a supportive, traditional feel without spending on features an empty room won't use most nights.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm single duvet fit, and they're the most widely stocked bedding of any UK size.
This size suits you if...
You're buying for a child or teenager moving up from a cot bed or outgrowing a small single, you need a supportive bed for a spare room or a study that doubles as guest space, or you're a single adult in a compact room where a wider mattress would crowd the walkway.
Consider another size if...
You're an adult sleeper who wants more width to stretch out. We'd recommend the UK small double instead: it's 30cm wider than the UK single, the same length, and we suggest a room of at least 2.4m x 2.8m for it.
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FAQ's
What are the dimensions of the Sealy Ortho Plus Essential UK single?
It measures 90 x 190cm, which is 3ft x 6ft 3in. That's the standard UK one-person size, so it fits ordinary single bed frames, divans and slatted bases without any adjustment. We suggest allowing at least 2.1m x 2.8m of floor space so you can walk round the bed comfortably.
Is the Sealy Ortho Plus Essential single a good choice for a child's bed?
For most children and teens, yes. The medium firm springs respond to body weight, so a lighter sleeper gets support without a hard, unyielding surface, and the breathable damask cover helps air move through on warm nights. Very light side sleepers may find it slightly firm at the shoulder, so consider how your child sleeps.
Will the Sealy Ortho Plus Essential UK single fit a bunk or mid sleeper frame?
The width and length match standard bunk and mid sleeper frames, but check depth before you buy. This mattress is 27cm deep, and raised frames usually set a maximum mattress depth so the guardrail still sits safely above the sleep surface. Check your frame's stated limit against that 27cm figure first.
Is a UK single big enough for an adult guest room?
For occasional guests, comfortably. A single adult has the full 90cm width to themselves, and the firmer open coil feel suits visitors used to traditional sprung beds. Two singles also work well where a guest room needs to sleep two people who aren't a couple, with a walkway kept between the beds.
Should I buy the UK single or size up to the small double?
It depends on the sleeper and the room. The UK single is 30cm narrower than the UK small double, and the two are the same length, so sizing up costs width rather than floor length. For a teenager staying long term or an adult who spreads out, the UK small double is worth it if you can allow at least 2.4m x 2.8m.