Head-to-Head Comparison
Ergoflex vs Koala Mattress
Traditional memory foam versus Australia’s most popular all-rounder. We compare both on feel, back support, trial, cooling and value to help you pick the right one.
⚡ Quick Verdict
These two suit different sleepers. Koala is the better all-rounder — flippable firmness, a much longer 120-night trial, faster delivery, and a safe choice for most people. But if you have back pain or specifically want a deep, traditional memory foam feel, Ergoflex is the stronger pick. Its 9cm high-density memory foam delivers orthopaedic contouring and class-leading motion isolation that Koala’s responsive Kloudcell foam doesn’t quite match. Choose Koala for versatility, Ergoflex for memory foam and back support.
Ergoflex 5G
Memory Foam · Back Pain Specialist
8.6
out of 10
Best for Back Pain
Koala Mattress
All-Foam · Most Popular
8.5
out of 10
Best All-Rounder
Specs
Side-by-side specifications
| Feature | Ergoflex 5G | Koala Mattress |
|---|---|---|
| Queen Price | ~$1,499 | $1,249 |
| Type | All-Foam (memory foam) | All-Foam (Kloudcell) |
| Foam Feel | Traditional slow-sink | Responsive, instant |
| Firmness | Medium-Firm (single) | Flippable: Medium-Firm / Firm |
| Trial Period | 30 nights | ✓ 120 nights |
| Warranty | 10 years | 10 years |
| Back Pain Support | ✓ Orthopaedic memory foam | Decent (mild pain) |
| Motion Isolation | ✓ Class-leading | ✓ Zero Disturbance |
| Cooling | Airflow layer | CoolThread (Plus model) |
| Washable Cover | ✓ TENCEL, removable | ✕ Fixed |
| Delivery | Free next-day metro | ✓ Free, 4hr metro |
| Best For | Back pain, memory foam lovers | All-rounders, couples |
Check Ergoflex Price
~$1,499 Queen · Best for back pain
Read Full Koala Review
$1,249 Queen · 120-night trial
Ergoflex 5G
Strengths
- 9cm memory foam — deepest in Australia
- Best-in-class back & joint pain support
- Outstanding motion isolation for couples
- Traditional Tempur-like memory foam feel
- Washable TENCEL cover · 20 years in AU
Weaknesses
- Only 30-night trial (vs Koala’s 120)
- One firmness — no adjustment
- Sleeps warmer than Koala
- Slightly higher RRP
Koala Mattress
Strengths
- Flippable firmness (medium-firm / firm)
- Long 120-night trial
- 4-hour same-day metro delivery
- Australia’s most popular, B-Corp certified
- Strong Zero Disturbance motion isolation
Weaknesses
- Only “decent” for serious back pain
- No deep memory foam contouring
- Cover not removable / washable
- All-foam — not ideal over 100kg
Recommendation
Which mattress is right for you?
Choose Ergoflex if you…
- Have back pain and need orthopaedic support
- Want a deep, traditional memory foam feel
- Share a bed and want top motion isolation
- Prefer a washable, removable cover
- Want a proven product (20 years in Australia)
Choose Koala if you…
- Want a safe, versatile all-rounder
- Like the option to flip firmness at home
- Want a longer trial to decide (120 nights)
- Need fast same-day metro delivery
- Prefer responsive foam over slow-sink
A Third Option
Two foams, and the thing neither of them has
Ergoflex and Koala are both all-foam, which is why this comparison keeps circling the same two complaints: heat and edges. Foam holds warmth because it wraps around you, and it has no perimeter structure to sit on. Neither brand can engineer that away.
Pocket springs remove both problems as a side effect of how they are built. Sleep Republic has 1,850 individually wrapped springs, a reinforced perimeter, and 150 nights to decide against Koala’s 120 and Ergoflex’s 30 — that last number matters, because foam softening tends to start after month three.
Stay with one of these two if: you want the deep memory-foam sink Ergoflex is known for, or Koala’s same-day delivery. Springs give you neither.
Read Our Sleep Republic Review
8.9 / 10 · 150-night trial
See today’s price at Sleep Republic →
1,850 pocket springs · 12-yr warranty
FAQ
Common questions
Which is better for back pain — Ergoflex or Koala?
Ergoflex has the clear edge for back pain. Its 9cm high-density memory foam moulds to your spine and provides deep orthopaedic pressure relief — it’s specifically designed and marketed for back pain sufferers. Koala’s 3-zone support base is decent for mild back pain, especially on the firmer setting, but for chronic or serious back pain, Ergoflex’s memory foam contouring is the stronger choice.
What’s the real difference in feel?
Ergoflex uses traditional viscoelastic memory foam — you slowly sink in over 30-60 seconds and the foam moulds around you (the classic memory foam “hug”). Koala uses Kloudcell foam that’s responsive and springs back instantly, with no sinking sensation. If you love the slow-sink memory foam feel, go Ergoflex. If you find memory foam too “stuck”, Koala feels more buoyant.
Is Koala’s longer trial a big deal?
It can be. Koala gives you 120 nights to decide versus Ergoflex’s 30. If you’re uncertain about memory foam or want maximum time to adjust, Koala’s longer trial is reassuring. That said, most people know within 2-3 weeks whether a mattress works for them, so 30 nights is usually enough — it’s just less of a safety net.
Which sleeps cooler?
Koala, slightly — especially the Koala Plus with its CoolThread cover and cooling beads. All dense memory foam (like Ergoflex) tends to retain more heat. Ergoflex’s airflow layer helps, but if you sleep very hot, Koala or a hybrid mattress will keep you cooler.
Which is better for couples?
Both are excellent for couples thanks to strong motion isolation. Ergoflex’s dense memory foam has class-leading motion absorption — you genuinely won’t feel a partner moving. Koala’s Zero Disturbance tech is also very good. If one partner has back pain, Ergoflex edges ahead; if you want to flip firmness to suit two preferences, Koala’s flippable layer helps.
📢 Affiliate Disclosure: This page contains affiliate links to Ergoflex. If you purchase through our links, we may earn a commission at no extra cost to you. This doesn’t influence our comparison — we include honest pros AND cons for both brands. Prices shown are approximate retail prices and may vary during sales. Last updated May 2026.