First of all shipping was extremely fast and efficient. I even got email/test confirmation. I also like how each mask is individually packaged. I bought the KF94 masks for kids and they are a perfect fit, though I do tie the ends for my younger child. They are easy to breathe in for them and far more effective than cloth masks. I have purchased over a couple hundred for the school year.
Watch out on Soomlab mask company South Korea as they are not longer responding to orders made and paid and not shipping or responding but their website is still accepting payment but not product shipped or response.