Emma Original Foam Mattress (Double) vs Koala Calm As Mattress (Double) (2026)

✍️ By the 247Verdict Editorial Team📅 Updated 05 October 2026

Which is better? We compared both on score, owner ratings, pros and cons.

Emma Original Foam Mattress (Double)

9.0/10 Excellent

4.4★ (22,400 owners)

Airgocell foam, Herdwick wool, 100-night trial, 40+ awards. Most decorated UK mattress.

Full Review

Koala Calm As Mattress (Double)

9.0/10 Excellent

4.5★ (4,800 owners)

Australian design, open-cell foam, copper-infused, 120-night trial, 10-year, B-Corp certified.

Full Review

At a Glance

	Emma Original Foam Mattress (Double)	Koala Calm As Mattress (Double)
247Verdict Score	9.0/10	9.0/10
Owner Rating	4.4★ (22,400)	4.5★ (4,800)
Verdict	Excellent	Excellent
Foam	Airgocell	Open-cell
Trial	100 nights	120 nights (longest)

Quick Verdict

This is a genuine draw — both score within 0.15 points of each other. Emma Original Foam Mattress (Double): Airgocell foam, Herdwick wool, 100-night trial, 40+ awards. Most decorated UK mattress. Koala Calm As Mattress (Double): Australian design, open-cell foam, copper-infused, 120-night trial, 10-year, B-Corp certified. Choose based on your specific needs. Check the current price on Amazon →

Pros & Cons Side by Side

Emma Original Foam Mattress (Double)

Airgocell foam 99x more breathable than standard memory foam
Herdwick wool cover natural temperature regulation
40+ awards including Which? Best Buy
100-night trial standard
22,400 Amazon reviews at 4.4★

All-foam — limited motion isolation for couples
Medium feel only

Koala Calm As Mattress (Double)

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

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

FAQ

Which is better, Emma Original Foam or Koala Calm As?

Is the Emma Original Foam worth the extra cost?

The Koala Calm As Mattress (Double) matches or exceeds it at a potentially lower price point.

Who is the Emma Original Foam best suited to?

Airgocell foam, Herdwick wool, 100-night trial, 40+ awards. Most decorated UK mattress.

Who is the Koala Calm As best suited to?

Australian design, open-cell foam, copper-infused, 120-night trial, 10-year, B-Corp certified.

What are the main downsides of each?

Emma Original Foam Mattress (Double): All-foam — limited motion isolation for couples; Medium feel only. Koala Calm As Mattress (Double): Less brand recognition in UK vs Emma, Eve or Simba; Copper infusion adds cost without the temperature improvement of true airflow hybrids.

Do owner ratings agree with our verdict?

Largely, yes — Emma Original Foam Mattress (Double) sits at 4.4★ from 22,400 verified Amazon owners, and Koala Calm As Mattress (Double) at 4.5★ from 4,800.

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