Silentnight UltraGel 3000 Pocket Firm 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
£784.89
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
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 for two, room to move: Two sharing get 67.5cm each, which leaves space for bedside tables on both sides in many ordinary UK bedrooms.
- Quieter nights when sharing: Individually moving pocket springs mean a partner turning over at 67.5cm away is less likely to disturb you than on an open coil bed.
- Firm support for back and front sleepers: The firm feel keeps two back or front sleepers well supported, although lighter side sleepers may find it a little unforgiving at the shoulder.
- Fits where a UK king would crowd: At 15cm narrower and 10cm shorter than the UK king, the UK double leaves more floor for a wardrobe and drawers.
- Simple to dress: Double sheets fit it directly and a 200 x 200cm double duvet covers two sleepers comfortably.
This size suits you if...
You share with a partner who also sleeps on their back or front, your bedroom is a standard UK size where a UK king would squeeze out the bedside tables, or you're setting up a guest room for visiting couples.
Consider another size if...
Either of you sprawls, runs tall, or wakes easily beside a restless partner. We'd recommend the UK king instead, giving 75cm each, and allow at least 2.7m x 2.9m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Is the Silentnight UltraGel 3000 Pocket Firm UK double big enough for two adults?
For most couples, yes. The UK double gives 67.5cm each, and the pocket springs help limit the disturbance that comes with sharing a narrower bed. If you're both broad shouldered or restless, the UK king adds 7.5cm each.
Silentnight UltraGel 3000 Pocket Firm double or king for a couple?
Pick the UK double if your room is on the smaller side; we suggest at least 2.6m x 2.8m. The UK king is 15cm wider and 10cm longer, and we suggest at least 2.7m x 2.9m, so it suits couples with more floor space.
Will a UK double Silentnight UltraGel 3000 fit a small spare bedroom?
Allow at least 2.6m x 2.8m, with around 3m x 3m feeling comfortable. In a tighter spare room, the UK small double is 15cm narrower at the same length, and we suggest at least 2.4m x 2.8m for it.
Is the UltraGel 3000 Pocket Firm UK double too firm for a guest room?
It depends on who visits. Back and front sleepers usually find a firm hybrid supportive, while lightweight side sleepers may feel pressure at the hip and shoulder on any size of this mattress.
What bedding do I need for the Silentnight UltraGel 3000 Pocket Firm double?
Standard double fitted sheets for 135 x 190cm, and a 200 x 200cm double duvet. Both are easy to find, so bedding won't hold you up if you're furnishing a room from scratch.