Silentnight 800 Mirapocket Mattress
Mattress
Silentnight 800 Mirapocket Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
26
Layers
2
Layer Details
- Eco Comfort Fibre. A comfort layer made from sustainable materials including repurposed plastic. It's highly breathable, which means air circulates freely through the mattress for a fresher, cooler feel through the night.
- Mirapocket Springs. 800 individual pocket springs, zoned to give targeted relief to your back, joints and hips. Because each spring moves independently, the mattress responds to your body shape and absorbs movement, so a restless partner is less likely to wake you.
Layer details from mattressonline.co.uk product page, September 2026.
- Fits where space is tight: At 3ft x 6ft 3in, this single leaves room for a desk, wardrobe or toy storage, and we suggest a floor space of just 2.1m x 2.8m.
- Sensible for growing sleepers: The medium firm zoned springs give firmer support under the hips, which means good spinal alignment for a child or teen who'll use this mattress for years.
- Works on raised frames: At 26cm deep it sits within the range most bunk, cabin and mid sleeper frames are built for, though you should check the guard rail height first.
- Cooler for small rooms: The Eco Comfort Fibre layer lets air move through rather than sit against the body, useful in a compact bedroom or loft space that warms up quickly.
- Cheap, easy bedding: Standard single sheets and duvets are the most widely stocked bedding in the UK, so refreshing a child's room or guest bed costs little.
This size suits you if...
You're buying for a child or teenager moving up to a full-size bed, you sleep solo in a compact room where every centimetre of floor space matters, or you're kitting out a spare room or student flat where the frame is provided and the mattress isn't. It also suits raised frames, subject to checking the guard rail against its 26cm depth.
Consider another size if...
You're an adult who spreads out at night, or you host couples in your guest room. The UK small double is 30cm wider at the same length, and we suggest allowing 2.4m x 2.8m of floor space for it.
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Will the Silentnight 800 Mirapocket single fit a bunk bed or mid sleeper?
The 90 x 190cm footprint matches standard UK bunk, cabin and mid sleeper frames, so it should sit correctly on the slats. The one thing to check is depth: this mattress is 26cm deep, and safety guidance for raised beds requires the guard rail to sit above the mattress surface, so measure your frame's rail before ordering.
Is the Silentnight 800 Mirapocket UK single good for a child or teenager?
It's a reasonable fit. The medium firm feel and zoned pocket springs support a growing spine rather than letting it sag, and the build is hypoallergenic with no foam layers to trap heat. Younger children moving up from a cot bed may find it a little solid at first, but firmer support generally serves kids better long term.
How much floor space does a UK single mattress need?
The mattress itself is 90 x 190cm, and we suggest allowing at least 2.1m x 2.8m of floor space so you can walk round the bed and open drawers or wardrobe doors. That makes the UK single the easiest size to place in box rooms, loft conversions with sloping ceilings and spare rooms that double as an office.
Should I buy the UK single or size up to the UK small double?
If the sleeper is an adult, or a teenager who'll keep the mattress into adulthood, the extra width helps: the UK single is 30cm narrower than the UK small double, and the two are the same length. You'll need more room for it though, and we suggest at least 2.4m x 2.8m of floor space for the UK small double.
Can I still buy the Silentnight 800 Mirapocket in a single?
Availability is the main caution with this mattress, as it's listed as discontinued at Mattress Online, and stock in each size can differ. The retailers and prices shown on this page are updated as retailers change them, so compare what's listed here and confirm the UK single is in stock before you commit.