Silentnight UltraGel 1400 Pocket Super King Mattress
The Silentnight UltraGel 1400 Pocket is a firm hybrid mattress that pairs a gel infused comfort layer with 1400 pocket springs.
- Firm feel with zoned support
- Gentle gel cushioning, no deep sink
- 60-night trial & 5-year guarantee
£828.28
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Silentnight UltraGel 1400 Pocket Mattress
More available sizes
Mattress details
Mattress
Silentnight UltraGel 1400 Pocket Mattress
Size
Firmness
Firm
Construction
Foam
Pocket Spring
Hybrid
Gel
Depth (cm)
29
Layers
2
Layer Details
UltraGel™ layer
A gel infused comfort layer that Silentnight describes as smart and responsive, designed to adapt to your movements. In practice that means comforting, soothing cushioning at the surface rather than a deep sink.
Mirapocket® springs
1400 individual pocket springs that adjust to your body weight, giving ease of movement and zoned support. Silentnight states this zoning is scientifically proven to improve spinal alignment and posture.
Layer details from silentnight.co.uk product page, September 2026.
Key benefits
- 90cm each when sharing: Two people sharing get 90cm apiece, so a partner who turns over every twenty minutes is happening well over on their own side of the bed.
- Firm feel that resists roll-together: The firm tension keeps the surface stable across its full 6ft width, so neither sleeper drifts into a dip in the middle.
- 1400 springs spread across the biggest footprint: The Mirapocket springs respond to each body individually, which means two sleepers of different weights each get their own support across all that width.
- Space for night-time visitors: When a child pads in at 3am, or a dog claims the foot of the bed, there's still enough room for the adults to sleep properly.
- Gel cushioning on top, not sink: The UltraGel comfort layer adds surface cushioning while keeping you on top of the mattress, so moving across a bed this wide takes little effort.
This size suits you if...
You share every night and want the maximum space a standard UK size offers, your partner is genuinely restless and distance matters more to you than any comfort layer, or children and pets regularly join you and everyone still needs their own patch. Your bedroom should comfortably clear 3m x 2.9m, with something nearer 3.5m x 3.2m feeling right.
Consider another size if...
Your room is under our suggested 3m x 2.9m minimum, or a bed this wide would crowd out wardrobes and door swing. We'd recommend the UK king instead: the same 200cm length, and we suggest at least 2.7m x 2.9m for it.
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FAQ's
Is the Silentnight UltraGel 1400 super king big enough for a family sharing?
For most families, yes. At 180 x 200cm you get a full 6ft of width, so when a child climbs in during the night, both adults still have room to sleep rather than clinging to the edges. The firm surface also makes it easy to shift position without disturbing anyone else.
Will a super king Silentnight UltraGel 1400 stop me feeling my partner move?
Width does most of the work here. With 90cm each, your partner's tossing happens far from you, and the 1400 individual pocket springs respond locally to weight rather than transferring movement across the bed. No mattress removes disturbance entirely, but this size and construction together reduce it considerably.
What room size do I need for the UltraGel 1400 in a UK super king?
We suggest a minimum of 3m x 2.9m, and around 3.5m x 3.2m feels comfortable, leaving space for bedside tables on both sides and wardrobe doors to open fully. In a large master or a period property with generous proportions, a UK king can look undersized, and this size fills the space properly.
Can I get this mattress upstairs in a super king?
It's the check that bites hardest at this size. A 180 x 200cm mattress is awkward on tight landing turns, narrow staircases and low loft hatches, so measure the route before ordering, including door swings and any ceiling slopes. This mattress arrives as a single piece rather than zip and link halves.
Where can I buy the Silentnight UltraGel 1400 in a super king?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so it's worth checking back before you commit, as the same super king mattress can vary noticeably between stockists at any given time.