Last seen for £905.25 at Mattress Man on 27th October 2026
Silentnight UltraGel 3000 Pocket Boxtop Medium Firm Small Double 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
- Room to spread out alone: At 30cm wider than the UK single and the same length, you can turn over or starfish without an arm dropping off the edge.
- Fits a tighter floor plan: Being 15cm narrower than the UK double means a little more clearance beside the bed, which can be the difference between a door opening fully or catching.
- Cushioned top on a sprung base: You get the plumper boxtop feel over pocket springs, so a solo sleeper has a softer first contact with support underneath across the whole 4ft width.
- A practical guest bed: Visiting couples can manage a night or two together, so a spare room stays usable for guests without giving the whole floor over to the bed.
- Modest room requirement: We suggest allowing at least 2.4m x 2.8m, which suits many box rooms, second bedrooms and compact loft conversions.
This size suits you if...
You sleep alone and have outgrown a single, your bedroom is too small to give up the floor space a UK double needs, or you're kitting out a spare room where couples stay now and then but nobody sleeps every night.
Consider another size if...
You share the bed with a partner every night and want space of your own. We'd recommend the UK double instead, which gives 67.5cm each, and we suggest at least 2.6m x 2.8m for it.
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FAQ's
Can a couple share the Silentnight UltraGel 3000 UK small double every night?
It works for occasional stays, but most couples find a UK small double tight for nightly use, particularly on a cushioned boxtop where you tend to settle close together. If you share every night, the UK double gives 67.5cm each. We suggest at least 2.6m x 2.8m for the UK double.
What room size do I need for a Silentnight UltraGel 3000 small double?
We suggest allowing at least 2.4m x 2.8m for the UK small double. That leaves space to walk round the bed and make it, and to open drawers. If your room is close to that minimum, measure where the door swings before you buy, as it is usually the first thing to clash.
Is the UltraGel 3000 in a UK small double a good step up from a single for a teenager?
For many families, yes. The UK small double is 30cm wider than the UK single and exactly the same length, so a growing teenager gains a lot of turning room while the bed only grows sideways. That helps in a bedroom that cannot spare much floor.
Will a small double Silentnight boxtop fit in a loft conversion bedroom?
Often it will, because the UK small double has a slimmer footprint than a double. In a loft, the sloping ceiling tends to limit where you can stand beside the bed, so the narrower 120cm width can keep a usable strip of full-height floor. Check your headroom as well as our suggested 2.4m x 2.8m.
What size is the Silentnight UltraGel 3000 UK small double in feet?
The UK small double is 4ft x 6ft 3in, which is 120 x 190cm. It takes standard UK small double (4ft) frames and fitted sheets. You can compare the retailers listed on this page for the size, and the prices shown here update as retailers change them.