Sealy Ortho Plus Silver Memory Mattress
Mattress
Sealy Ortho Plus Silver Memory Mattress
Size
Firmness
Construction
Depth (cm)
25
Layers
2
Layer Details
- MemorySense Foam PowerPack. A comfort layer that adapts to the shape of your body, cocooning you in soft foam. It relieves pressure on the parts of your body that bear the majority of your weight, typically hips and shoulders.
- PostureTech CS Spring System with EdgeGuard. Sealy's adaptive spring system responds to subtle shifts in body weight and pressure, giving localised support rather than a uniform push-back. High-density EdgeGuard foam strips wrapped around the inside of the springs firm up the edges of the bed.
Layer details from mattressnextday.co.uk product page, September 2026.
- Fits compact rooms: At 90cm wide it leaves floor space free for a desk, wardrobe and toy storage, and we suggest a room of at least 2.1m x 2.8m.
- Support for growing sleepers: The medium firm PostureTech CS springs keep a child's or teenager's spine supported, which means the mattress can last through the growing years rather than softening early.
- Firm edges for smaller beds: EdgeGuard foam strips firm up the perimeter, useful on a narrow mattress where you're never far from the edge.
- Guest-ready comfort: The MemorySense foam layer cushions hips and shoulders, so a spare room single feels welcoming rather than an afterthought.
- Easy, cheap bedding: Standard single sheets and a single duvet fit, the most widely stocked and affordable bedding of any UK size.
This size suits you if...
You're buying for a child's or teenager's room where the bed shares space with a desk and wardrobe, you're a single adult in a compact bedroom or first flat, or you're furnishing a guest room or study that doubles as sleeping space. It also suits siblings sharing a room, where two UK singles plus a walkway fit more comfortably than one larger bed.
Consider another size if...
You're an adult who sprawls, or you share the bed. We'd recommend the UK small double, which is 30cm wider and the same length; allow at least 2.4m x 2.8m of floor space for it.
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What size is the Sealy Ortho Plus Silver UK single?
It measures 90 x 190cm, which is 3ft x 6ft 3in. That's the standard UK single, so it fits any standard single bed frame and takes standard single sheets and duvets. We suggest a room of at least 2.1m x 2.8m to leave space to move around the bed.
Will the Sealy Ortho Plus Silver single work on a bunk or mid sleeper?
Possibly, but check first. At 25cm deep it's on the thicker side for raised frames, and many bunk beds specify a maximum mattress depth so the guard rail stays high enough. Measure from the base to the top of the rail before ordering. Bear in mind it's delivered flat, so it needs lifting up to the top bunk in one piece.
Is the Sealy Ortho Plus Silver UK single good for a child or teenager?
Yes, with one caveat. The medium firm feel and PostureTech CS springs give the steady support growing backs need, and the firm EdgeGuard perimeter helps on a narrow bed where kids sleep close to the edge. Very light children may find the memory foam layer takes a little body heat to soften and shape around them.
Will the UK single fit through a narrow staircase or loft conversion?
This mattress arrives flat rather than rolled and boxed, so the 90 x 190cm size has to make it up your stairs in one piece. The single is the easiest size to manoeuvre, but if you're heading to a loft room or around a tight turn, measure the awkward point of the route before you buy.
Where is the cheapest place to buy the Sealy Ortho Plus Silver single?
Prices change often, so rather than name a figure here, compare the retailers listed on this page. The prices shown are updated as retailers change them, which means what you see reflects what you'd actually pay today for the UK single specifically, not the model's starting price in another size.