Our Verdict
Koala Calm As provides B-Corp certification, 120-night trial and copper-infused cooling in an Australian design. Leesa is the other B-Corp mattress reviewed — Koala adds the longest non-split trial period and copper antimicrobial properties. For ethically-driven buyers who want third-party verified B-Corp accountability with maximum trial duration, Koala makes the strongest case.
Pros & Cons
✓ Pros
- 120-night trial — the longest single-period trial alongside DreamCloud reviewed
- B-Corp certified — Koala's environmental and social standards verified by third-party assessment
- Copper-infused open-cell foam provides antimicrobial properties alongside cooling
- Australian design heritage applied to UK market — different design philosophy from UK brands
- 10-year warranty with B-Corp accountability for long-term quality commitment
✗ Cons
- Less brand recognition in UK vs Emma, Eve or Simba
- Copper infusion adds cost without the temperature improvement of true airflow hybrids
- Australian brand with UK fulfilment — customer service response from Australian headquarters
Key Specifications
| Trial | 120 nights (longest) |
|---|---|
| BCorp | Certified |
| Infusion | Copper (antimicrobial) |
| Foam | Open-cell |
| Warranty | 10 years |
| Brand | Koala Australian |
Performance
Koala Calm As provides B-Corp certification, 120-night trial and copper-infused cooling in an Australian design. Leesa is the other B-Corp mattress reviewed — Koala adds the longest non-split trial period and copper antimicrobial properties. For ethically-driven buyers who want third-party verified B-Corp accountability with maximum trial duration, Koala makes the strongest case. On paper the headline numbers are trial of 120 nights (longest), bcorp of Certified, infusion of Copper (antimicrobial), foam of Open-cell, warranty of 10 years, brand of Koala Australian. Its standout is that 120-night trial — the longest single-period trial alongside dreamcloud reviewed
Build Quality & Design
Beyond that, owners and the spec sheet point to a few more genuine strengths. B-Corp certified — Koala's environmental and social standards verified by third-party assessment. Copper-infused open-cell foam provides antimicrobial properties alongside cooling. We can't bench-test durability, but the depth of positive long-term owner feedback is the best available proxy for how it holds up.
Value for Money
It isn't flawless. Less brand recognition in UK vs Emma, Eve or Simba. Copper infusion adds cost without the temperature improvement of true airflow hybrids. Australian brand with UK fulfilment — customer service response from Australian headquarters. Whether those matter depends entirely on how you'll use it. At the premium price point, the trade-offs are easy to live with for the right buyer. It's the right call for Koala Calm As provides B-Corp certification, 120-night trial and copper-infused cooling in an Australian design. Leesa is the other B-Corp mattress reviewed — Koala adds the longest non-split... Look elsewhere if you're among Hot sleepers seeking maximum airflow — Eve Premium Hybrid or Purple Hybrid are more effective for temperature.
Final Verdict
Koala Calm As provides B-Corp certification, 120-night trial and copper-infused cooling in an Australian design. Leesa is the other B-Corp mattress reviewed — Koala adds the longest non-split trial period and copper antimicrobial properties. For ethically-driven buyers who want third-party verified B-Corp accountability with maximum trial duration, Koala makes the strongest case.
Check Price on Amazon ↗FAQ
Is the Koala Calm As Mattress (Double) worth the money?
Koala Calm As provides B-Corp certification, 120-night trial and copper-infused cooling in an Australian design. Leesa is the other B-Corp mattress reviewed — Koala adds the longest non-split trial period and copper antimicrobial properties. For ethically-driven buyers who want third-party verified B-Corp accountability with maximum trial duration, Koala makes the strongest case. Koala Calm As provides B-Corp certification, 120-night trial and copper-infused cooling in an Australian design. Lees
Who should NOT buy the Koala Calm As Mattress (Double)?
Hot sleepers seeking maximum airflow — Eve Premium Hybrid or Purple Hybrid are more effective for temperature.
Is the Koala Calm As Mattress (Double) available in the UK and US?
Yes — we list both Amazon UK and US links. Always verify voltage compatibility (UK 230V, US 120V).
Alternatives to Consider
Vi-Spring Herald Superb Mattress (Double)
9.4/10Calico pocket springs, natural wool + cotton, hand-tufted Plymouth UK, 30-year guarantee. British luxury benchmark.
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Hypnos Pillow Top Wool Mattress (Double)
9.3/10Hand-tufted, British wool, pocket springs, Royal Warrant. The hotel mattress in your home.
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Hypnos Orthos Support Mattress (Double)
9.3/10Hand-tufted, ReActivePro springs, natural fillings, Royal Warrant, UK made. The royal mattress.
Check Price ↗Or see full comparisons: vs Vi-Spring Herald Superb Mattress (Double), vs Hypnos Pillow Top Wool Mattress (Double), vs Hypnos Orthos Support Mattress (Double)