Arthur Sleep Cool Gel Super King Mattress
Arthur Sleep

Arthur Sleep Cool Gel Super King Mattress

The Arthur Sleep Cool Gel Mattress is a hybrid, meaning it combines springs with foam layers, available in five UK sizes from Single up to Super King.

  • Medium feel for most sleepers
  • Gel-infused foam for cooler nights
  • Targeted pocket-sprung support

£389

Size: Super King. Available at Mattress Man

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Where can I buy the Arthur Sleep Cool Gel Super King Mattress?

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

Arthur Sleep Cool Gel Mattress

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Prices last checked:
15th October 2026

Mattress dimensions for the Arthur Sleep Cool Gel Super King Mattress

Length: 200cm

Width: 180cm

(6ft x 6ft 6in)

Minimum room size: 3m x 2.9m

Mattress details

Mattress Details for the Arthur Sleep Cool Gel Super King Mattress

Mattress

Arthur Sleep Cool Gel Mattress

Size

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

Firmness

Medium

Construction

  • Pocket Spring

  • Hybrid

  • Gel

Depth (cm)

Layers

Layer Details

Key benefits

Key Benefits of the Arthur Sleep Cool Gel Super King Mattress

  • Maximum sleeping space: At 180 x 200cm, that's 6ft x 6ft 6in, this is as much bed as the Arthur Sleep range offers, with room to spare for two.
  • Distance from a restless partner: With 90cm each for two people sharing, a fidgeter on one side becomes far easier to sleep through, whatever the comfort layers are doing.
  • Room for the whole household: Children padding in at 3am or a large dog treating the bed as routine are absorbed with far less disruption at this width.
  • Hybrid feel at an affordable price: Springs with foam on top is a combination that usually costs more, so getting it at this size keeps a big bed within reach.
  • Suits larger bedrooms: In a period master or a generous new build main bedroom, where a UK king can look a little lost, this size fills the space properly.

Who should buy the Arthur Sleep Cool Gel Super King Mattress?

This size suits you if...

You share the bed every night and want enough width that neither of you notices the other move, your children or pets regularly end up in with you, or your master bedroom is large enough that a smaller bed would look undersized. Allow at least 3m x 2.9m of floor space, and slightly more if you want bedside tables on both sides with room to walk around.

Consider another size if...

Your bedroom falls short of the 3m x 2.9m we suggest for this size, or you'd struggle to get something this wide up the stairs. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs a room of at least 2.7m x 2.9m.

FAQ's

Frequently Asked Questions About the UK Super King

How big is the Arthur Sleep Cool Gel Mattress in a UK super king?

It measures 180 x 200cm, which is 6ft x 6ft 6in. That works out at 90cm each for two people sharing, so each of you gets the same width as a UK single. It's the largest of the five sizes Arthur Sleep makes this mattress in.

What room do I need for the Arthur Sleep Cool Gel in a UK super king?

We suggest at least 3m x 2.9m of floor space. That leaves enough clearance to open drawers and walk round the bed, though a larger room feels more comfortable. Before ordering, measure your stairs and landing turns too: a mattress this wide is the awkward part of the move, not the room itself.

Should I get the UK super king or the UK king in this mattress?

The UK super king is 30cm wider than the UK king, and the two are the same length. If a restless partner wakes you, or children and pets join you most nights, that extra width does more for your sleep than any mattress layer. In a smaller room, the UK king is the more sensible fit.

Is the UK super king Cool Gel a good choice for families sharing the bed?

It's the best size in the range for it. With 90cm per person for a couple, a small child squeezing in between you still leaves everyone a reasonable share, and a dog at the foot of the bed barely registers. On any narrower size, the same visitors cost you real sleeping space.

Where can I compare prices on the Arthur Sleep Cool Gel super king?

Use the price table on this page, which is updated as retailers change their prices, so what you see reflects current listings. Arthur Sleep doesn't publish detailed construction specs for this mattress, so checking the retailer's own listing before you buy is sensible if a particular detail matters to you.