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Sealy Alston Gel Advantage Pillow Top Double Mattress
Sealy

Sealy Alston Gel Advantage Pillow Top Double Mattress

The Sealy Alston Gel Advantage Pillow Top Mattress combines a Geltex breathable comfort layer with a pillow top, which means extra surface cushioning on a medium-rated mattress, with less trapped heat.

  • Cushioned pillow top surface
  • Breathable gel comfort layer
  • Reinforced edges for steadier sides
£899

£619

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Size: Double. Available at Mattress Online

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Where can I buy the Sealy Alston Gel Advantage Pillow Top Double Mattress?

Below are the best prices for the Sealy Alston Gel Advantage Pillow Top Mattress in a Double. Available from (9) trusted retailers.

Sealy Alston Gel Advantage Pillow Top Mattress

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Prices last checked:
30th October 2026

Mattress dimensions for the Sealy Alston Gel Advantage Pillow Top Double Mattress

Length: 190cm

Width: 135cm

(4ft 6in x 6ft 3in)

Minimum room size: 2.6m x 2.8m

Mattress details

Mattress Details for the Sealy Alston Gel Advantage Pillow Top Double Mattress

Mattress

Sealy Alston Gel Advantage Pillow Top Mattress

Size

UK Double (4ft 6in x 6ft 3in)

Firmness

Medium

Construction

  • Foam

  • Gel

Depth (cm)

29

Layers

Layer Details

Key benefits

Key Benefits of the Sealy Alston Gel Advantage Pillow Top Double Mattress

  • Sized for an ordinary bedroom: We suggest a room of at least 2.6m x 2.8m, which means many master bedrooms, and plenty of second bedrooms, can take this mattress alongside a wardrobe and drawers.
  • Steadier sides for closer sharing: With 67.5cm each for two people sharing, one of you will often lie near the edge, and the high-density foam Edge Guard border should keep that side feeling steadier.
  • Less trapped heat between two sleepers: Two people in a UK double give off a fair bit of warmth, and the open-cell Geltex layer is designed to breathe and hold on to less heat.
  • Bedding that is easy to find: Standard double sheets fit the UK double, and a 200 x 200cm double duvet gives two people enough to share without a nightly tug of war.
  • A middle-ground feel for two: Sealy rates it medium with a pillow top on the surface, so couples with slightly different tastes get a little give without the mattress feeling soft.

Who should buy the Sealy Alston Gel Advantage Pillow Top Double Mattress?

This size suits you if...

You share a bed in a typical UK bedroom and still want bedside tables on both sides, or you're furnishing a guest room where visiting couples will sleep, and you'd like a medium feel with a cushioned pillow top surface.

Consider another size if...

You and your partner both like to spread out, or one of you is tall. We'd recommend the UK king instead, which gives 75cm each and 10cm more length; allow at least 2.7m x 2.9m for it.

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FAQ's

Frequently Asked Questions About the UK Double

Is the Sealy Alston Gel Advantage Pillow Top UK double big enough for two people?

For most couples, yes. You get 67.5cm each, which is snug but workable if neither of you sprawls. The Edge Guard foam border should help the outer few centimetres feel usable. If you often end up nudging each other, the UK king gives 7.5cm more each.

What size bedroom do I need for a UK double mattress?

We suggest at least 2.6m x 2.8m. Around 3m x 3m is more comfortable, and that is roughly what you need if you want a bedside table on each side and space to walk round the bed without turning sideways.

Sealy Alston pillow top: UK double or UK king for a couple?

The UK king is 15cm wider and 10cm longer, giving 75cm each against 67.5cm in the UK double. It also needs more floor, so we suggest at least 2.7m x 2.9m. If your room is tight, the UK double keeps space for furniture.

What sheets and duvet fit a Sealy Alston UK double?

Standard double sheets fit, and a 200 x 200cm double duvet suits two sleepers. The mattress is 29cm deep with a pillow top, so check that the fitted sheet's pocket depth comfortably covers it before you buy.

Should I get the UK double or UK small double for a guest room?

The UK double is 15cm wider than the UK small double and the same length, which makes a real difference for visiting couples. The UK small double suits a smaller room, needing at least 2.4m x 2.8m, against 2.6m x 2.8m for the UK double.