Filters out 99% of wearer's exhaled bacteria. Resists fluids lightweight, breathable. Easy to put on, no strings to tie. Nexcare Earloop mask is a fluid resistant single use mask that helps protect others from bacteria exhaled by the wearer and helps reduce exposure of the wearer to splashes of blood and body fluids.&; This lightweight mask was designed to provide comfort and easy breathing. As determined by the modified Greene and Vesley test method..