Komfi Vitality Ultra Firm Single Mattress in a Box
Komfi

Komfi Vitality Ultra Firm Single 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

£212.12

Size: Single. Available at Archers Sleepcentre

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

Below are the best prices for the Komfi Vitality Ultra Firm Mattress in a Box in a Single. 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 Single Mattress in a Box

Length: 190cm

Width: 90cm

(3ft x 6ft 3in)

Minimum room size: 2.1m x 2.8m

Mattress details

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

Mattress

Komfi Vitality Ultra Firm Mattress in a Box

Size

UK Single (3ft 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 Single Mattress in a Box

  • Room left for everything else: At 3ft wide, the UK single leaves space for a desk and wardrobe in a small bedroom, and we suggest allowing at least 2.1m x 2.8m.
  • A sensible depth for raised frames: The mattress is 20cm deep, so check your bunk, cabin or mid sleeper frame's maximum mattress depth before ordering, because the safety rail needs to sit well above the surface.
  • Firm support for older children and teens: Heavier teenagers who sleep on their backs get even support across the whole surface, with no soft top layer that dips where their weight settles.
  • Easy to keep clean in a child's room: The cover zips off and goes in the wash, which helps when spills and muddy feet are part of normal life.
  • Two singles for a flexible guest room: A pair of UK singles in a spare room gives visiting friends a bed each, and the firm feel stays the same from one edge to the other.

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

This size suits you if...

You sleep alone and like a very firm, flat feel, particularly on your back, or you're furnishing a compact bedroom, a bunk or cabin frame, or a spare room where two separate beds suit your guests better than one shared one.

Consider another size if...

You're an adult who sprawls, or you'd like room for a partner on the odd night. We'd recommend the UK small double instead, which is 30cm wider at the same length; allow at least 2.4m x 2.8m.

FAQ's

Frequently Asked Questions About the UK Single

Will the Komfi Vitality Ultra Firm UK single fit a bunk bed?

It's a standard 90 x 190cm UK single, so it suits most bunk and cabin frames built for that size. The depth is 20cm, though, and raised frames usually state a maximum mattress depth so the guard rail stays high enough. Check that figure in your frame's instructions before you buy.

Is the Komfi Vitality Ultra Firm too firm for a child in a UK single?

It might be for a small or lightweight child, particularly one who sleeps on their side, because there's no soft layer to cushion shoulders and hips. Older children and teenagers who sleep on their backs are more likely to get on with it. If your child prefers a softer bed, a firm mattress could make bedtime harder rather than easier.

What size is a UK single Komfi Vitality Ultra Firm in feet?

The UK single measures 3ft x 6ft 3in, which is 90 x 190cm. Standard UK single sheets fit, and a single duvet measures 135 x 200cm.

How much room do I need for a UK single mattress?

We suggest at least 2.1m x 2.8m of floor space for a UK single. That leaves room to get in and out comfortably, with space beside the bed for a desk or chest of drawers in a child's room or a box room.

Should I choose a UK single or UK small double Komfi Vitality Ultra Firm for a spare room?

If guests usually stay alone, or you'd like two separate beds, the UK single makes better use of the space. The UK small double is 30cm wider and the same length, which gives a solo adult more room to spread out, and we suggest at least 2.4m x 2.8m for it.