For those who prefer a flat mask, the Tie-On Face Mask provides comfort and breathability. Fluid resistant to help reduce potential exposure of the wearer to blood and body fluids. Greater than 99% Bacterial Filtration Efficiency (BFE) when challenged with a mean particle size of approximately 2.7 microns. Convenient ear loop design allows you to slip on and remove mask quickly and easily. Ear loop mask is soft and lightweight for comfortable wear.