The Sumfree KF94 mask passed our particulate filtration efficiency machine test with a score of 99.14%. KF94 masks are boat-style and made in Korea, which has very strict production guidelines. All KF94 masks have ear loops instead of head straps or head ties.
Mask breathability is determined by airflow resistance, which we measure in pascals. The target for adults should be around 150, and the target for children should be close to 100. The airflow resistance of this mask is 211.
This mask has an odor similar to wood smoke. The breathability is also more difficult than what it should be for a KF94. Most should skip this mask, unless you have a larger face and need appropriate coverage.We found this mask on Amazon. Check out our video review for more details.