Mask challegnge: everyone wearing a reusable mask right now, test your masks out. Our masks are tested to be 99% BFE and 97.8% PFE effective for 100 washes. Many others will say it's washable or durable to x amount of washes but is it effective? Cotton is not water repellent by nature and if they say they are, do this challenge, easily done in any bathroom and see if by spraying water droplets with force (like when someone is sneezing on you) that your masks stay dry.