Silentnight UltraGel 3000 Pocket Firm Small Double Mattress
The Silentnight UltraGel 3000 Pocket Firm is a hybrid mattress, which means it pairs pocket springs with a comfort layer rather than relying on foam alone.
- Firm support for back & front sleepers
- Minimises partner disturbance
- Springs contour to your shape
£778.89
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Silentnight UltraGel 3000 Pocket Firm Mattress
More available sizes
Mattress details
Mattress
Silentnight UltraGel 3000 Pocket Firm Mattress
Size
Firmness
Firm
Construction
Pocket Spring
Hybrid
Gel
Depth (cm)
Layers
3
Layer Details
UltraGel comfort layer
A gel-infused comfort layer that Silentnight describes as responding to movement and easing pressure. For you, that means a surface that adjusts as you shift, with some cushioning on top of a firm feel.
Foam layer
A foam layer that Silentnight calls its most breathable foam yet, used together with the gel-infused layer above it. That should help the top of the mattress feel less stuffy as you sleep.
Boxtop
A boxtop that adds a softer, more cushioned finish and works with the springs below to give zoned support. You get a little comfort at the surface, while the firm feel underneath keeps you supported.
Layer details from silentnight.co.uk and mattressonline.co.uk product pages, October 2026.
Key benefits
- Room to spread out on your own: The UK small double is 30cm wider than the UK single, which means one adult can sleep diagonally or starfish on a firm surface without edging towards the side.
- Fits a compact double room: We suggest a room of at least 2.4m x 2.8m for the UK small double, so it can go into a small second bedroom where a UK double would crowd the door.
- Calmer for the occasional couple: Pocket springs move independently, which means visiting guests are less likely to feel each other turn over, although sharing a UK small double every night will feel snug.
- Firm support across the full width: The firm feel gives back and front sleepers steady support edge to edge, although lightweight side sleepers may find it a little unyielding at the shoulder and hip.
- Simple to find frames and bedding for: The UK small double is a standard 4ft size, so frames and fitted sheets are easy to find on the high street without ordering specialist bedding.
This size suits you if...
You sleep alone and feel hemmed in on a UK single, or your second bedroom or loft conversion is too tight for a UK double, and you only host a couple now and then rather than every night.
Consider another size if...
You share the bed with a partner every night. We'd recommend the UK double instead, which gives 67.5cm each, and we suggest at least 2.6m x 2.8m for the UK double.
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FAQ's
Is the Silentnight UltraGel 3000 Pocket Firm small double a good upgrade for a teenager?
For a teenager who has outgrown a UK single, the UK small double adds 30cm of width while staying the same length, so it takes up little extra floor. The firm feel suits teens who sleep on their back or front. If they are already tall, bear in mind the UK small double adds width only, no extra length.
What size room do I need for a UK small double UltraGel 3000 Pocket Firm?
We suggest allowing at least 2.4m x 2.8m for the UK small double. That leaves space to walk around the bed and open a wardrobe or door. If your room is smaller, the UK single needs less, and we suggest at least 2.1m x 2.8m for the UK single.
Can two guests sleep on the UltraGel 3000 Pocket Firm in a small double?
Yes, for the odd night. The pocket springs work independently, so one guest turning over is less likely to disturb the other. It is a close fit for two adults, though, so if couples stay regularly the UK double gives 67.5cm each and will feel noticeably less cramped.
Will a Silentnight UltraGel 3000 UK small double fit in a loft conversion?
Often it will, because the UK small double is 15cm narrower than the UK double, which can free up standing room beside the bed under a sloping ceiling. Measure the full-height floor area rather than the total room, and check you can still reach both sides of the mattress to make the bed.
Should one person choose the small double or double UltraGel 3000 Pocket Firm?
Most solo sleepers are comfortable on the UK small double, and it keeps more of the room free. Choose the UK double if you have the space and like a lot of room, since it is 15cm wider at the same length. We suggest at least 2.6m x 2.8m for the UK double.