Firmness
Extra Firm
Type
Orthopaedic
Depth (cm)
20
Number of Layers
2
Trial Period (nights)
Warranty (years)
5
Price Range
£299 to £429
Best Sleeping Position(s)
Certifications
Assessed from MattressNextDay's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Choose this mattress if firm support is your priority. The reflex foam layer conforms to your body while keeping you well supported, which means better spinal alignment and posture rather than a soft, cradling feel. Across owner feedback on the MattressNextDay product page, it's described as very supportive and well suited to heavier builds. The breathable knitted cover helps keep you at an even temperature through the night. It's made in the UK by an NBF-approved manufacturer, meets the BS7177: 2008 fire safety standard, and the price range of £299 to £429 is honest for what you get: a simple, sturdy foam mattress without extras you may not need.
Key Features & what's inside
- 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 all night.
- Reflex Foam. Reflex foam is a dense, responsive foam that conforms to the shape of your body. It offers tailored support to help improve your spinal alignment and posture.
Layer details from mattressnextday.co.uk product page, September 2026.
Who's it NOT for?
This is not the mattress for anyone who likes a soft, cushioned feel. It's extra firm, and lightweight sleepers or dedicated side sleepers may find it too hard on the shoulders and hips. If you want plush comfort layers, memory foam contouring or a hybrid spring feel, look elsewhere.
MattressNextDay Ortho Support Foam Mattress
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How firm is the MattressNextDay Ortho Support Foam Mattress?
It's rated extra firm, which is as firm as mattresses get. That makes it a good match for back sleepers, heavier builds and anyone advised to sleep on a very supportive surface, but a poor match for those who like a softer, more forgiving feel.
What is the MattressNextDay Ortho Support Foam Mattress made of?
It's an all-foam mattress, 20cm deep, built from a layer of reflex foam beneath a breathable knitted cover. Reflex foam is a dense, springy foam that responds to your body shape while staying firm, which means support without the slow sink of memory foam.
Does the MattressNextDay Ortho Support Foam Mattress have a guarantee?
Yes, it comes with a 5-year guarantee from MattressNextDay. It's also made in the UK by an NBF-approved manufacturer and meets the BS7177: 2008 fire resistance standard.
Is the MattressNextDay Ortho Support Foam Mattress good for allergies?
It's listed as hypoallergenic, so it's a sensible pick if you're prone to allergies. It's also vegan friendly, with no animal-derived fillings.
What sizes does the MattressNextDay Ortho Support Foam Mattress come in?
Five UK sizes: Single, Small Double, Double, King and Super King, priced from £299 to £429. Delivery is free next day to mainland UK, though some addresses may incur a small fee.
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