When customers ask me, “Which foam is best in a mattress?”, what they’re really asking is “What feels most comfortable and lasts the longest?” That’s what matters in real life, not marketing terms.
We've worked with mattresses for years here at FurnitureTree in New Zealand, and I’ve seen firsthand what works, what doesn’t, and why. So, here’s a clear, honest breakdown of the most common foams used in mattresses and which might be right for you.
1. Memory Foam – Best for Pressure Relief and Comfort
What It Is
Memory foam is a visco-elastic material that responds to your body heat and weight. It softens where you press and gently hugs your shape.
Why People Choose It
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Exceptional pressure relief for shoulders, hips, and back
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Feels like the mattress is tailored to your shape
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Great for reducing pain points
Real Experience from Customers
Most people who come in with back or joint discomfort notice a big difference with memory foam. It’s especially strong for side sleepers and anyone who wants a soft, cradling feel.
Drawbacks to Know
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Can feel warm if it doesn’t have cooling layers
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Some people feel “stuck” instead of floating on top
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Lower-grade memory foam can sag quickly
Best For
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Side sleepers
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People with pressure pain
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Those who like a soft, contouring feel
2. High-Density Foam – Best for Longevity and Support
What It Is
High-density foam is firmer and denser than standard foams meaning it supports and lasts longer.
Why It Matters
Density is one of the biggest predictors of mattress life. A higher density foam will not break down as fast, so your mattress feels longer.
Real Experience from Customers
Customers who complain about sagging mattresses after a year usually have low-density foam. Once they switch to high density, they notice the mattress feels firmer and holds shape much better.
Drawbacks
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Firmer feel may not suit everyone
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Can feel less “cushy” than softer foams
Best For
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Back sleepers
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People who want a firm or medium-firm mattress
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Anyone who wants longer lifespan
3. Gel-Infused Memory Foam – Best for Hot Sleepers
What It Is
Traditional memory foam can trap heat. Gel-infused foam combines cooling gel beads or layers to improve airflow and reduce warmth.
Why People Choose It
In New Zealand’s warmer months (or heated homes), a memory foam mattress can sometimes feel like a heated bed. Gel helps:
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Draw heat away from the body
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Improve overall sleep temperature
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Keep surface cooler
Real Experience
We see a lot of Auckland and Wellington sleepers prefer gel-infused versions because they get memory foam comfort without overheating.
Best For
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Hot sleepers
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Memory-foam lovers who want cooling
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Those in warm climates or heated homes
4. Polyurethane Foam (PU Foam) – Best for Budget Options
What It Is
Polyurethane foam is the most common foam you’ll find in basic mattresses. It’s what many entry-level mattresses are built from.
Why It’s Used
It’s affordable and can be made in different firmness levels.
Real Experience
PU foam is fine for guest rooms, kids’ beds, or short-term use. But if you’re buying your main mattress, We usually recommend spending a bit more. PU low density breaks down faster than other foams, so it can feel lumpy over time.
Best For
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Guest rooms
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Short-term mattress uses
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Budget-friendly options
5. Latex Foam – Best Natural & Responsive Choice
What It Is
Latex foam can be natural (from rubber trees) or synthetic. It’s bouncy, breathable, and inherently cooler than memory foam.
Why It’s Great
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Very breathable stays cooler
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More responsive easier to move on
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Durable long lifespan
Real Experience
Customers who want a natural feel and bounce often prefer latex. It doesn’t have that sinking memory foam feel, so sleepers who change positions frequently like it a lot.
Best For
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Hot sleepers
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Active sleepers
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Buyers wanting natural materials
So, Which Foam Is Actually Best?
Here’s the reality from FurnitureTree:
|
Foam Type |
Best Feature |
Recommended For |
|
Memory Foam |
Pressure relief |
Side sleepers, pain relief |
|
High-Density Foam |
Support + longevity |
Back sleepers, long life |
|
Gel-Infused Foam |
Cooling + comfort |
Hot sleepers |
|
Polyurethane Foam |
Budget option |
Guest beds, short term |
|
Latex Foam |
Breathability + responsiveness |
Hot sleepers, active shift sleepers |
My Honest Recommendation
If you asked us personally and We’ve helped thousands of Kiwi customers this is how We would break it down:
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Top Overall Choice: Gel-infused memory foam
Because you get comfort + cooling -
Best for Long Lifespan: High-density foam
Support lasts longer -
Best Natural Feel: Latex foam
Cool and responsive -
Best Budget: PU foam (entry-level)
But not main mattress
Putting It All Together Before You Buy
Before you choose, ask yourself:
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Do I sleep hot or cool?
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What’s my sleep position?
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Do I want a firm or soft feel?
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Do I have any back or joint pain?
Your answers to these will guide you more than the brand name on the mattress.
At FurnitureTree, we always encourage customers to try before you buy. Foam feels different once you lie down. And because you sleep on it every night, it’s worth being sure.