Sealy Advantage Quartz Memory Mattress
Mattress
Sealy Advantage Quartz Memory Mattress
Size
Firmness
Construction
Depth (cm)
27
Layers
4
Layer Details
- Quilted Cover. The cover is stitched together with the fillings to create a patterned comfort quilt, which means the surface has a soft, cushioned feel built in rather than a flat top. It's the first thing you'll notice when you lie down.
- MemorySense Foam. This memory foam layer adapts to your body position, cocooning you and easing pressure at the shoulders and hips. In practice, that means less tossing and turning to get comfortable.
- PostureTech CS Springs. These springs respond to your body weight to give deep-down support, so heavier areas get more pushback than lighter ones. They're twice tempered, meaning the steel is heat-treated twice to stay resilient over years of use.
- EdgeGuard. A high-density foam strip reinforces the springs around the perimeter, extending their lifespan. You'll feel this as a firmer, more supportive edge, useful if you sit on the bed or share it and need the full width.
Layer details from mattressnextday.co.uk product page, September 2026.
- A footprint that leaves room to live: At 90cm wide, this size leaves space for a desk, wardrobe or toy storage in a child's bedroom rather than swallowing the floor.
- Medium firm support for growing sleepers: Sealy rates it Medium Firm, which means teenagers get proper spinal support rather than sinking into a soft surface that sags within a few years.
- EdgeGuard matters more on a narrow bed: The reinforced perimeter firms up the sides, so a restless child or an adult guest can use the full 90cm width without a roll-off feeling.
- Springs that suit a spare room: The twice tempered PostureTech springs hold their shape through years of occasional guest use, so it won't feel tired the third time someone actually sleeps on it.
- Cheap, easy bedding: Standard single sheets and a single duvet fit, and they're the most widely stocked bedding of any UK size.
This size suits you if...
You're kitting out a child's or teenager's room and want a supportive mattress they won't outgrow quickly, you need a dependable one-person bed for a spare room or a study that doubles as guest space, or you're a solo adult in a compact bedroom, a loft conversion or a first flat where a 90cm wide bed is the sensible fit.
Consider another size if...
You're an adult who spreads out in your sleep, or you're sharing the bed even occasionally. We'd recommend the Sealy Advantage Quartz in a UK small double instead, which is 30cm wider and the same length; allow at least 2.4m x 2.8m for it.
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Will the Sealy Advantage Quartz UK single fit a bunk or mid sleeper frame?
The 90 x 190cm footprint matches standard UK bunk and mid-sleeper frames, but the mattress is 27cm deep, which is on the deeper side for a raised bed. Check your frame's maximum mattress depth and guard rail height before buying, as a top bunk rail needs to sit clearly above the sleeping surface.
Is the Sealy Advantage Quartz UK single suitable for a child?
Yes, with a caveat on age. The Medium Firm feel and PostureTech springs give the kind of even support growing backs need, and memory foam eases pressure at the shoulders and hips. Memory foam isn't generally recommended for very young children, though, so it's better suited to older kids and teenagers.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space, which gives you room to walk alongside the bed and open drawers or wardrobe doors. That guidance is ours rather than Sealy's. In a loft room, also check the 90cm width sits where you have standing head height.
Can an adult sleep comfortably on the Sealy Advantage Quartz in a UK single?
A solo adult, yes. At 90cm wide it's the standard UK one-person size, and the EdgeGuard reinforcement means the sides stay supportive, so you can use the full width rather than avoiding the perimeter. The 190cm length suits most adults, though very tall sleepers may prefer the UK king at 200cm long.
Where can I buy the Sealy Advantage Quartz in a UK single?
Compare the retailers listed on this page; the prices shown here are updated as retailers change them, so it's worth checking back if you're not buying straight away. Stock and pricing for the UK single can differ from the larger sizes, so a deal on the UK double won't always apply here.