MattressNextDay Luxury Support Foam Mattress
Mattress
MattressNextDay Luxury Support Foam Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
20
Layers
2
Layer Details
- Knitted Cover. A soft knitted cover that's breathable, which means heat can escape rather than build up around you. It helps keep you at an even temperature through the night.
- Reflex Foam. Reflex foam conforms to the shape of your body, which means you get tailored support where you need it. It's designed to help your spinal alignment and posture, giving a comfortable, supportive night's sleep.
Layer details from mattressnextday.co.uk product page, September 2026.
- Fits where space is tight: At 3ft x 6ft 3in it leaves room for a desk, wardrobe and toy storage in a child's bedroom, or two beds in a shared one.
- Suited to raised frames: At 20cm deep and arriving rolled and boxed, it is a practical match for bunk beds, cabin beds and mid sleepers, where taller mattresses can sit above the guard rail.
- Supportive for growing sleepers: The medium firm reflex foam keeps the spine aligned rather than letting a light body sink, which suits children and teens moving up from a first bed.
- Sensible for spare rooms: A UK single works well in a spare room that doubles as an office, giving occasional guests firm-leaning foam support without dominating the floor.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm single duvet fit, and both are the most widely stocked bedding of any UK size.
This size suits you if...
You're buying for a child's or teenager's room where the bed shares space with a desk and wardrobe, you need a mattress for a bunk, cabin or mid sleeper frame, or you're kitting out a guest room or student flat where the frame is provided and a straightforward, supportive foam mattress is all that's needed.
Consider another size if...
You're an adult who sleeps alone and wants more room to stretch out. We'd suggest the UK small double instead: it's 30cm wider, the same length, and we suggest at least 2.4m x 2.8m of floor space for it.
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What size is the MattressNextDay Luxury Support Foam Mattress in a UK single?
It measures 90 x 190cm, which is 3ft x 6ft 3in. That's the standard UK one-person size, so it fits any standard single bed frame, divan or bunk. We suggest allowing at least 2.1m x 2.8m of floor space, which leaves room to walk around the bed in a compact room.
Is the UK single suitable for a bunk bed or mid sleeper?
Generally yes. At 90 x 190cm it matches standard UK bunk and cabin frames, and at 20cm deep it should sit below the guard rail on most designs. Raised frames often specify a maximum mattress depth, so check yours before ordering. It arrives rolled and boxed, which makes getting it up to a top bunk easier.
Is the MattressNextDay Luxury Support Foam Mattress UK single good for a child or teenager?
It's a reasonable fit. The medium firm reflex foam supports spinal alignment rather than letting a light body sink, which suits growing sleepers, and it's hypoallergenic, a plus for children with allergies. If your child prefers a soft, cradling feel, this firmer foam may take some getting used to.
Should I choose the UK single or the UK small double for one adult?
It depends on your room and how much you spread out. The UK single is 30cm narrower than the UK small double and the two are the same length. If your bedroom offers at least 2.4m x 2.8m, the UK small double gives a solo adult noticeably more width; below that, the UK single is the safer fit.
What bedding do I need for the MattressNextDay Luxury Support Foam Mattress single?
Standard single fitted sheets and a single duvet, which measures 135 x 200cm, fit this mattress. Single bedding is the cheapest and most widely stocked of any UK size, so a spare set for a child's room or guest bed is easy to find in supermarkets as well as bedding shops.