Description KAYLEINSTER Ear Loop 3 ply Mask  – Civil Grade:    A 3 ply mask has three layers: 1. the outside layer:  that repels water, blood and body fluids 2. a quality middle filter layer: this filters the air passing through it. The certification process checks the quality of the filter 3. the inner layer (against your face): it can act as a barrier for water, sweat and spit.   Meets or exceeds specification: Filtration Efficiency: ≥ 95%   The Protective Mask is designed to protect against solids, water-based aerosols, and oil-based aerosols.