MattressNextDay Ortho Support Foam Mattress

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 is fair for what you get: a simple, sturdy foam mattress without extras you may not need.

Back sleepers
The extra firm reflex foam gives a solid, supportive surface that keeps you from sinking in, which suits anyone who wants a flat, level feel on their back.

Heavier sleepers
Dense reflex foam resists sinking, and owner feedback in the copy describes it as very supportive and well suited to heavier builds.

Warm sleepers
A breathable knitted cover lets heat escape rather than build up around you, which helps keep your temperature even through the night.

Allergy sufferers
The mattress is hypoallergenic, which makes it a sensible pick if you want a simple foam bed without extras that may irritate.

Front sleepers
Its very firm, dense surface stops your middle sinking down, which means a flatter, more level feel when you sleep face down.

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.

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. Delivery is free next day to mainland UK, though some addresses may incur a small fee.