The AusAir AirWeave mask claims to offer superior breathability with its wool filters compared to traditional meltblown plastic filters. However, testing revealed that while the AirWeave is breathable, it doesn't outperform meltblown masks. In a comparison of 12 masks, the AirWeave ranked in the middle regarding breathability. It didn't meet the Canadian CA-N95 standard for the most breathable masks, which requires a pressure drop under 100 Pa at an airflow rate of 85 liters per minute. Testing involved a silicone headform and a Scince filter testing machine to ensure consistent airflow through the masks. The AusAir mask struggled to seal properly, which could skew breathability results due to potential seal leakage. The standout performer in the tests was the Moldex M4620 N95, which uses a corrugated filter design to increase surface area and improve breathability. Despite the lack of a nose wire for adjustment, it achieved high fit test scores. Other masks tested included the AirQueen Nano and the 3M 8511, both of which had their own breathability characteristics. While the AusAir mask is aesthetically pleasing and backed by third-party lab testing showing 99% filtration, its fit is inconsistent across users. The marketing could be clearer, as it conflates testing standards for medical face masks with those for respirators, which are not directly comparable. Despite its shortcomings, the AusAir may still be suitable for some users, though personal fit remains a critical factor.