The All Keeper KF94 mask passed our particulate filtration efficiency machine test with a score of 98.98%. 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 218.54.
This mask has an inoffensive fabric odor. With its high airflow resistance score, It's going to be hard to breathe in, but KF94s do offer more breathable area. The overall construction was rated good.
Someone sent us this mask for testing. Check out our video review for more details.