Komfi Vitality Ultra Firm Double Mattress in a Box
Komfi

Komfi Vitality Ultra Firm Double Mattress in a Box

The Komfi Vitality Ultra Firm Mattress in a Box is a single thick layer of high-density reflex foam, which means you get firm, even support from edge to edge with no softer top layer to sink into.

  • Very firm, flat sleeping surface
  • Edge-to-edge support
  • Removable cover, washable

£282.89

Size: Double. Available at Archers Sleepcentre

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Where can I buy the Komfi Vitality Ultra Firm Double Mattress in a Box?

Below are the best prices for the Komfi Vitality Ultra Firm Mattress in a Box in a Double. Available from (9) trusted retailers.

Komfi Vitality Ultra Firm Mattress in a Box

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Prices last checked:
31st October 2026

Mattress dimensions for the Komfi Vitality Ultra Firm Double Mattress in a Box

Length: 190cm

Width: 135cm

(4ft 6in x 6ft 3in)

Minimum room size: 2.6m x 2.8m

Mattress details

Mattress Details for the Komfi Vitality Ultra Firm Double Mattress in a Box

Mattress

Komfi Vitality Ultra Firm Mattress in a Box

Size

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

Firmness

Extra Firm

Construction

  • Eco-Friendly

  • Foam

  • Rolled

Depth (cm)

20

Layers

Layer Details

Key benefits

Key Benefits of the Komfi Vitality Ultra Firm Double Mattress in a Box

  • Fits a typical shared bedroom: We suggest a room of at least 2.6m x 2.8m, which means most master bedrooms and many second bedrooms can take it without losing the wardrobe.
  • The same feel for both of you: It is one layer of reflex foam throughout, which means neither side of the UK double is softer than the other, provided you both genuinely like a very firm bed.
  • Easier up awkward stairs: It comes vacuum-packed in a box, so getting a UK double up the turning staircase of an older terrace or onto a tight landing is far simpler than with a traditional mattress.
  • Bedding you can buy anywhere: Standard double sheets fit, along with a 200 x 200cm double duvet, so you can furnish a first home without hunting for specialist sizes.
  • Less space each than a UK king: Yes, you get 7.5cm less each than on the UK king, but the UK double asks for a smaller room, so fit both sleepers and the furniture around you.

Who should buy the Komfi Vitality Ultra Firm Double Mattress in a Box?

This size suits you if...

You share the bed with a partner who also prefers a very firm, flat surface, and your bedroom is around 2.6m x 2.8m or larger. It also fits if you are kitting out a first flat or a guest room for visiting couples and need the bed, drawers and bedside tables all to fit.

Consider another size if...

Your bedroom is smaller than 2.6m x 2.8m, or one of you is a side sleeper who needs cushioning. For tight rooms, we'd recommend the UK small double, which needs at least 2.4m x 2.8m.

FAQ's

Frequently Asked Questions About the UK Double

What are the dimensions of the Komfi Vitality Ultra Firm UK double?

The UK double measures 135 x 190cm, which is 4ft 6in x 6ft 3in. It is the same 20cm depth as every other size of this mattress, so check that your fitted sheets have deep enough pockets before you order them.

Is a UK double big enough for two people to share?

It gives 67.5cm each for two sharing. That suits most couples who sleep fairly still, although broad-shouldered sleepers or restless partners may feel a little cramped. The UK king gives 75cm each, so 7.5cm more per person, if your room can take it.

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

We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. At the smaller end you may struggle to fit bedside tables on both sides as well as a wardrobe, so measure the walking space around the bed, as well as the bed itself.

Should I choose the Komfi Vitality Ultra Firm in a UK double or a UK king?

The UK king is 15cm wider and 10cm longer, and we suggest at least 2.7m x 2.9m for it. If your room is close to the UK double minimum, or either of you is under six foot, the UK double is the more practical choice. Taller couples should size up.

What bedding fits a Komfi double mattress?

Standard double sheets fit the 135 x 190cm mattress, and a 200 x 200cm double duvet gives a good overhang for two. These are sold almost everywhere at every budget, which helps if you are furnishing a whole home at once and the money is stretched.