The current All Foam memory foam mattress range uses either 2 inches or 3 inches of memory foam above a deeper support layer. That extra inch changes the depth of the comfort section, but it does not tell you by itself whether the finished mattress will feel softer or firmer.
The foam underneath matters just as much. A 3-inch memory foam layer over a high-density base can create a firmer finished mattress than a 2-inch memory foam layer over a medium support base.
This guide explains what the layer depth changes and what it does not.
Quick answer
A 3-inch memory foam layer gives more viscoelastic comfort material than a 2-inch layer, so the contouring section is deeper. It does not automatically make the complete mattress softer. The support foam grade, support depth, cover, bed base and sleeper all affect the finished feel.
What does the memory foam layer do?
Memory foam is a viscoelastic polyurethane foam that responds gradually to warmth and pressure.
In a layered mattress, it normally sits near the sleeping surface and acts as the comfort section. As load is applied, the material becomes more yielding around the areas under pressure and follows the body more closely than faster-recovery support foam.
The deeper support layer beneath it performs a different job. It provides most of the mattress structure and controls how far the upper layer can settle before the base becomes the dominant part of the feel.
This is why the memory foam depth should always be read together with the support construction.
What does 2 inches of memory foam mean?
Two inches is approximately 5.1cm.
In the current All Foam range, Deep Sleeper Comfort uses 2 inches of memory foam above 6 inches of medium density support foam. The finished mattress is 20cm deep and is the medium option in the range.
The 2-inch comfort layer creates a clear memory foam surface without making the viscoelastic section the majority of the mattress depth.
Someone choosing this model is not simply choosing "less memory foam". They are choosing a complete construction that combines that 2-inch comfort layer with a medium support base.
What does 3 inches of memory foam mean?
Three inches is approximately 7.6cm.
Deep Sleeper Back Care and Luxury Deep Sleeper both use 3 inches of memory foam, but the mattresses do not have the same overall construction.
Deep Sleeper Back Care uses:
- 3 inches of memory foam
- 6 inches of high density support foam
- 22.5cm total mattress depth
Luxury Deep Sleeper uses:
- 3 inches of memory foam
- 7 inches of Luxury Reflex support foam
- 25cm total depth including the cover
The memory foam depth is the same in both, yet the support layer is different. This is a clear example of why comfort-layer depth cannot describe the whole mattress.
Does 3 inches of memory foam feel softer than 2 inches?
Not necessarily.
A deeper memory foam layer gives more room for the viscoelastic material to respond before the deeper base dominates the feel. However, the base foam can be firmer, denser or more resilient than the support underneath a mattress with a thinner comfort layer.
In the current All Foam range, the 2-inch Deep Sleeper Comfort is the medium model, while the 3-inch Deep Sleeper Back Care is the firm model.
So the simple statement "more memory foam means softer" would be inaccurate.
Compare the finished mattress firmness and layer build instead.
Does a thicker memory foam layer mean more support?
Support and comfort depth should not be treated as the same thing.
The memory foam layer contributes to how closely the surface follows the body. The deeper base provides most of the structural support through the mattress.
A mattress with 3 inches of memory foam still needs a suitable base underneath it. Memory foam on its own is not the complete mattress support system.
The memory foam mattress buying guide explains how the comfort and support sections work together when comparing a complete mattress.
Body weight changes how the layer is experienced
Two people can lie on the same mattress and experience the comfort layer differently.
A person applying more load over a similar contact area can compress the upper foam further. A lighter sleeper may remain closer to the top of the comfort layer.
Body shape and sleeping position also change where pressure is concentrated.
This does not create a universal rule that a particular body weight needs exactly 2 or 3 inches of memory foam. It means the same construction can feel different to different people.
Use the layer depth as part of the comparison rather than as a fixed prescription.
Sleeping position affects contact with the surface
Side sleeping places concentrated contact through areas such as the shoulder and hip. Back sleeping spreads load differently, while front sleeping creates another pressure pattern.
A deeper memory foam section can allow more contouring before the support base is felt, but the overall firmness still depends on the base.
If you mainly sleep on your side, the memory foam mattress for side sleepers guide explains how comfort depth and support interact without claiming that one mattress suits every side sleeper.
For back sleepers, see the foam mattress for back sleepers guide.
The bed base changes the finished feel too
A mattress does not perform in isolation.
A level, supportive bed base helps the mattress maintain its intended construction. A damaged or bowed base can make a sound mattress feel uneven.
Slatted bases may be suitable when the slats provide even support and the gaps are appropriate for the mattress. If the base flexes excessively or has large unsupported gaps, the finished feel can change.
The foam mattress on slats guide explains what to check before putting a new foam mattress onto an existing frame.
Total mattress depth still matters
The current All Foam mattresses are not all the same total depth.
Deep Sleeper Comfort is 20cm.
Deep Sleeper Back Care is 22.5cm.
Luxury Deep Sleeper is 25cm including the cover.
Part of that difference comes from the memory foam depth, but part also comes from the support foam underneath.
If bed height, fitted sheets, mobility or the height of the bed frame matter, compare the finished mattress depth rather than looking only at the memory foam layer.
The foam mattress thickness guide covers the wider depth decision.
More memory foam is not automatically better value
A mattress should be judged from the construction you actually prefer, not from the largest number in one specification line.
A customer who wants a balanced medium feel may prefer Deep Sleeper Comfort even though it has 2 inches of memory foam rather than 3.
A customer who wants a firmer, more stable surface may prefer Deep Sleeper Back Care because the high-density support base changes the finished feel.
Luxury Deep Sleeper uses the same 3-inch memory foam depth as Back Care but combines it with a deeper Luxury Reflex support layer.
The value comes from the complete mattress matching the requirement, not from maximising the amount of one foam type.
Compare the three current constructions
A simple comparison is:
Deep Sleeper Comfort
- Medium feel
- 2 inches memory foam
- 6 inches medium density support foam
- 20cm total depth
Deep Sleeper Back Care
- Firm feel
- 3 inches memory foam
- 6 inches high density support foam
- 22.5cm total depth
Luxury Deep Sleeper
- Luxury high firm feel
- 3 inches memory foam
- 7 inches Luxury Reflex support foam
- 25cm total depth including cover
All three are currently available in Single, Double, King Size and Super King.
What should you compare before choosing?
Ask yourself:
- Do I prefer a medium or firmer overall mattress?
- Do I want a deeper memory foam comfort section?
- What support foam sits beneath the memory foam?
- What total mattress depth fits my bed setup?
- Is my existing bed base level and supportive?
- Do I prefer slower contouring at the surface or a more stable overall feel?
These questions are more useful than simply asking whether 2 inches or 3 inches is "best".
Choose the whole mattress, not one layer
The difference between a 2-inch and 3-inch memory foam layer is real, but it is only one part of the construction.
Use the memory foam mattress page to compare each model's memory foam depth, support layer, total depth, firmness and current price. If the standard constructions do not match the layer combination you want, the custom mattress builder provides a separate route for choosing a layered foam construction.
