Relyon Ultra Cool Gel 2400 Super King Mattress
Relyon

Relyon Ultra Cool Gel 2400 Super King Mattress

The Relyon Ultra Cool Gel 2400 is a hybrid mattress, which means it combines springs with comfort layers rather than relying on foam alone.

  • Suits sleepers who run warm
  • Medium-firm feel, easy to move on
  • From a long-established British maker

£1,495.15

Size: Super King. Available at Mattress Man

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Where can I buy the Relyon Ultra Cool Gel 2400 Super King Mattress?

Below are the best prices for the Relyon Ultra Cool Gel 2400 Mattress in a Super King. Available from (9) trusted retailers.

Relyon Ultra Cool Gel 2400 Mattress

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Prices last checked:
11th November 2026

Mattress dimensions for the Relyon Ultra Cool Gel 2400 Super King Mattress

Length: 200cm

Width: 180cm

(6ft x 6ft 6in)

Minimum room size: 3m x 2.9m

Mattress details

Mattress Details for the Relyon Ultra Cool Gel 2400 Super King Mattress

Mattress

Relyon Ultra Cool Gel 2400 Mattress

Size

UK Super King (6ft x 6ft 6in)

Firmness

Medium Firm

Construction

  • Pocket Spring

  • Hybrid

  • Gel

Depth (cm)

Layers

Layer Details

Key benefits

Key Benefits of the Relyon Ultra Cool Gel 2400 Super King Mattress

  • 90cm each for two: With 90cm of width per person, the UK super king gives each sharer 22.5cm more than the UK double, which means far fewer elbows in the night.
  • Distance from a restless sleeper: Width does more than any comfort layer to stop a fidgeting partner waking you, and the UK super king gives 15cm more each than the UK king.
  • Room when the household piles in: When a child pads in at 3am or the dog claims the foot of the bed, a 6ft wide surface still leaves the adults somewhere to sleep.
  • A steady feel across a big surface: Relyon rates this hybrid medium firm, which means less sinking in, useful when you share a 180cm surface with a child or pet shifting about.
  • Suits the scale of a large room: In a period property or generous master bedroom a UK king can look undersized, whereas the UK super king's 180 x 200cm footprint fills the space properly.

Who should buy the Relyon Ultra Cool Gel 2400 Super King Mattress?

This size suits you if...

You share with a partner who moves a lot and want 90cm each, children or dogs regularly end up in bed with you, or your bedroom comfortably clears our suggested minimum of 3m x 2.9m.

Consider another size if...

Your room is smaller than 3m x 2.9m, or you usually sleep alone. We'd recommend the UK king instead, for which we suggest at least 2.7m x 2.9m.

FAQ's

Frequently Asked Questions About the UK Super King

Is the Relyon Ultra Cool Gel 2400 super king big enough for two adults and a child?

It gives 90cm each for two adults, the widest option in this range, so a small child joining you has more room to settle without pushing anyone to the edge. Relyon rates it medium firm, so the surface stays fairly stable as people move. If this happens most nights, the UK super king is the size to choose.

Relyon Ultra Cool Gel 2400 super king or king for a restless partner?

The UK super king is 30cm wider than the UK king at the same length, giving 15cm more each. With a partner who fidgets, that extra distance tends to help more than any change of feel. We suggest at least 3m x 2.9m for the UK super king, against 2.7m x 2.9m for the UK king.

Will a super king Relyon Ultra Cool Gel 2400 fit in a loft conversion bedroom?

Only if the room has enough full-height floor. We suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling right, but in a loft the roof slope usually decides which wall the headboard goes against. Measure where you can stand upright, and check the landing turn and door swing too.

How much bigger is the Relyon Ultra Cool Gel 2400 super king than the double?

The UK super king is 45cm wider and 10cm longer than the UK double. For two people sharing, that means 90cm each rather than 67.5cm, so 22.5cm more per person. It needs more floor as well: we suggest at least 3m x 2.9m for the UK super king and 2.6m x 2.8m for the UK double.

Can I share a Relyon Ultra Cool Gel 2400 in super king with a large dog?

A 6ft wide surface gives a big dog space to stretch out while each adult keeps a sensible share of the bed. Yes, bedding costs more in a UK super king, since you'll need super king sheets and a 260 x 220cm duvet, but that is a one-off change rather than an ongoing cost.