Last seen for £733.50 at Mattress Man on 27th October 2026
Silentnight UltraGel 3000 Pocket Boxtop Medium Firm Single Mattress
The Silentnight UltraGel 3000 Pocket Boxtop is a medium firm hybrid, pairing pocket springs with gel comfort material and a boxtop finish, which means you get support underneath with a plumper, more cushioned sleeping surface than a standard flat-top mattress.
- Medium-firm feel suits most sleepers
- Box top softens the first feel
- From a long-established UK name
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
More available sizes
Last seen for £905.25 at Mattress Man on 27th October 2026
Last seen for £1,092.25 at Mattress Man on 10th November 2026
Last seen for £1,321.75 at Mattress Man on 10th November 2026
Last seen for £905.25 at Mattress Man on 10th November 2026
Last seen for £733.50 at Mattress Man on 27th October 2026
Mattress details
Mattress
Silentnight UltraGel 3000 Pocket Boxtop Medium Firm Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Hybrid
Gel
Depth (cm)
Layers
Layer Details
Key benefits
- Leaves room for everything else: At 90cm wide, the UK single leaves space for a desk, wardrobe and toy storage, which means a child's room still has somewhere to play.
- Supportive for growing bodies: Pocket springs respond to each movement individually, so a teenager going through growth spurts gets steady support beneath a softer, gel-infused boxtop surface.
- Comfortable for guests who never stay long: A medium firm feel is one most sleepers adapt to quickly, which matters on a spare room bed when visitors only have a night or two to settle.
- Works as a pair in a twin room: Two UK singles side by side let guests or siblings sleep on separate spring units, so one restless sleeper won't disturb the other.
- Fits a narrow floor plan: In a loft conversion where headroom drops away at the sides, the slim UK single footprint can sit along the tallest part of the room.
This size suits you if...
You're kitting out a child's or teenager's room and want something more supportive than a basic foam mattress, or you're furnishing a spare room that doubles as a study. It also suits a single adult in a first flat or a compact bedroom where a wider bed would crowd out storage.
Consider another size if...
You're an adult who spreads out, or a partner or child regularly ends up in bed with you. We'd recommend the UK small double instead, which is 30cm wider; we suggest at least 2.4m x 2.8m for it.
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FAQ's
Is the Silentnight UltraGel 3000 UK single good for a teenager?
For most teenagers it's a sensible choice. The pocket springs give firm-leaning support through the back and hips, while the boxtop adds a cushioned layer on top, which suits teens who find very firm mattresses uncomfortable. If your teenager already sprawls across the bed, the UK small double gives an extra 30cm of width at the same length.
Will the UltraGel 3000 boxtop UK single fit a cabin bed or mid sleeper?
The 90 x 190cm footprint matches standard single frames. Depth is the concern: raised frames usually set a maximum mattress height so the safety rail stays effective, and a boxtop adds height to the mattress. Silentnight's listing here doesn't give a depth, so check the brand's figure against your frame maker's limit before ordering.
What size room do I need for a Silentnight UltraGel 3000 UK single?
We suggest allowing at least 2.1m x 2.8m of floor space. That leaves room to walk around the bed and open drawers or a wardrobe. In a shared children's room with two beds and a walkway between them, measure the full layout first, including space to get in and out of both beds.
Is a UK single UltraGel 3000 wide enough for an adult to sleep on?
For one adult who sleeps fairly still, yes. At 90cm wide it's the standard one-person size. It won't suit regular sharing, though. If you need room for two, the UK double gives 67.5cm each and we suggest at least 2.6m x 2.8m of floor space for it.
Should I buy two UltraGel 3000 UK singles for a twin guest room?
Two UK singles are a practical way to host friends or siblings who'd rather not share. Each guest gets their own spring unit, so movement doesn't carry across. Boxtop mattresses can't be flipped, only rotated, so turning both head to foot now and then helps keep wear even on a pair that gets occasional use.