Tuft & Springs Radiance 1000 Gel Hybrid Super King Mattress
The Tuft & Springs Radiance 1000 Gel Hybrid is a medium-feel hybrid that pairs 1000 pocket springs with Cooling Gel Fusion™ memory foam, which means you get contouring comfort without the heat build-up traditional memory foam is known for.
- Memory foam hug without the heat
- Reduces roll-together for couples
- Suits most back & side sleepers
£799
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Tuft & Springs Radiance 1000 Gel Hybrid Mattress
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Mattress details
Mattress
Tuft & Springs Radiance 1000 Gel Hybrid Mattress
Size
Firmness
Medium
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Gel
Depth (cm)
29
Layers
3
Layer Details
Sleep Surface
A soft knitted cover gives a breathable, inviting finish. It's the first thing you'll feel, and it helps air move through the top of the mattress.
Comfort Layer
Cooling Gel Fusion™ memory foam gently contours to your body, which means pressure relief at the shoulders and hips. The gel-infused design draws heat away from the sleep surface to help regulate your temperature through the night.
Support System
1000 individually responsive pocket springs move independently to support your body. That independence helps eliminate roll-together, so you're less likely to drift into the middle of the bed.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- A full 90cm each: Two people sharing get 90cm each, which means you can turn over or stretch out without meeting your partner halfway across the bed.
- Room when the family piles in: When a young child wanders in during the night, the extra width means everyone still gets a proper share rather than one adult clinging to the edge.
- Distance plus independent springs: The 1000 pocket springs move independently, and at this width there's more physical distance between you, so a restless partner is much easier to sleep through.
- Cooler with more bodies in bed: More sleepers or a dog on the bed means more body heat, and the gel-infused memory foam is designed to draw warmth away from the surface.
- Proportioned for a large room: In a period property or a spacious master bedroom, a UK king can look a little lost, and the UK super king fills the space more convincingly.
This size suits you if...
You share with a partner whose tossing and turning keeps waking you, or your children or a large dog regularly end up in the bed with you, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is smaller than 3m x 2.9m, or a full 180cm of width would crowd your walkways. We'd recommend the UK king instead, where we suggest at least 2.7m x 2.9m.
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FAQ's
Is the Radiance 1000 super king big enough for two adults and a child?
For occasional visits, usually yes. The UK super king gives two adults 90cm each, so a small child tucked between you still leaves both of you enough room to lie comfortably. If a child sleeps with you every night as they grow, the space will start to feel shared rather than generous.
Radiance 1000 super king vs king: how much extra room do you get?
The UK super king is 30cm wider than the UK king, and both are the same length. For two people sharing, that works out at 15cm more each. The trade-off is floor space: we suggest at least 2.7m x 2.9m for the UK king and at least 3m x 2.9m for the UK super king.
Is a super king Radiance 1000 good if my partner is a restless sleeper?
It's one of the better setups for it. The pocket springs move independently, so movement travels less across the surface, but distance helps even more than any comfort layer. With 90cm each on the UK super king, a partner's turning happens further away from you, which many light sleepers find makes the bigger difference.
Can two people and a large dog share a Radiance 1000 super king?
There's more room for it than on any other size of this mattress, with 90cm each for the two of you before the dog claims its patch. A big dog adds warmth too, and the gel-infused foam is designed to draw heat away, which helps if the bed tends to feel stuffy with three of you in it.
Will a Radiance 1000 super king fit in a loft conversion bedroom?
Only if the room has enough full-height floor space. We suggest at least 3m x 2.9m, but in a loft conversion the slope of the roof usually dictates which wall the headboard goes against. Measure where you can actually stand and get in and out of bed, and check that the door swing clears a 180cm-wide bed.