Silentnight Achieve Pocket Sprung Kids' Single Mattress
The Silentnight Achieve Pocket Sprung Kids' Mattress uses Mirapocket springs that move individually, which means your child gets responsive support that adapts to their movements, on a foam-free build made for ages 3 and up.
- Foam-free & chemical-free build
- Breathable fibres for comfortable sleep
- Hypoallergenic for sensitive sleepers
£349
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Silentnight Achieve Pocket Sprung Kids' Mattress
More available sizes
Mattress details
Mattress
Silentnight Achieve Pocket Sprung Kids' Mattress
Size
Firmness
Construction
Pocket Spring
Depth (cm)
Layers
3
Layer Details
Quilted surface
A smooth quilted sleep surface, which gives your child an even, comfortable top to sleep on.
Adaptive fillings (two layers)
Two generous layers of adaptive fillings for lasting support, which helps the mattress keep its comfort through years of nightly use.
Mirapocket springs
Mirapocket springs that move individually to give responsive support, so the mattress follows your child's movements rather than shifting as one piece.
Layer details from dreams.co.uk product page, November 2026.
Key benefits
- Fits standard children's frames: At 90 x 190cm it matches the standard UK single, which means it should sit neatly in most children's beds and single bunks without gaps at the edges.
- Leaves floor for everything else: A 3ft wide bed leaves space in a small bedroom for a wardrobe and desk too, and we suggest allowing at least 2.1m x 2.8m.
- Works for siblings sharing: Two UK singles side by side can still leave a walkway in a shared room, giving each child their own bed and their own mattress.
- Springs that move on their own: Mirapocket springs move individually, which means a restless child turning over in a narrow bed doesn't set the whole mattress moving.
- Easy, widely stocked bedding: Standard single sheets and a single duvet (135 x 200cm) fit, so a spare set for a midnight change is simple to find.
This size suits you if...
Your child is 3 or older and sleeps in a standard single bed, bunk or cabin frame, or two siblings share a room and each needs a bed of their own with space to walk between them.
Consider another size if...
Your child is under 3, or the bed you're filling is wider than a UK single. Silentnight makes this mattress in a UK single only, so no other size is available.
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FAQ's
Will the Silentnight Achieve UK single fit a bunk bed or mid sleeper?
Its 90 x 190cm footprint matches the base of most single bunks and mid sleepers. Raised frames usually set a maximum mattress depth so the guard rail stays effective, though, and Silentnight doesn't publish a depth for this mattress. Check the frame maker's limit and the brand's own guidance before buying.
How much floor space do I need for a UK single kids' mattress?
We suggest at least 2.1m x 2.8m for a UK single. In a child's room that also holds a wardrobe and toy storage, that allowance leaves space to open drawers and get round the bed. In a loft conversion, put the low side of the ceiling over the bed, away from where your child climbs out.
What size sheets and duvet fit the Silentnight Achieve single?
Standard UK single sheets fit the 90 x 190cm surface, and a single duvet at 135 x 200cm covers it with some overhang. Single bedding is the easiest size to find in shops, which helps with younger children, as you can keep a clean spare set ready.
Is a UK single big enough for a teenager?
For most teenagers, yes. The UK single is 190cm long, or 6ft 3in, which suits most heights. A tall teen who sprawls may find 90cm a little narrow, and because this mattress comes in a UK single only, wanting more width would mean choosing a different mattress.
Can two siblings each have a Silentnight Achieve single in a shared room?
Yes, and the 3ft width is what makes twin beds workable in a shared room. Separate mattresses mean one child turning over won't disturb the other. Measure the room first to make sure both beds fit with a walkway between, then compare the retailers listed on this page.