Mercer Industries D10008N N95 NIOSH Approved Particulate Respirator with Valve, 10 Pack NIOSH Approved Respirator removes 95% of harmful particulates in the air for light duty or short duration applications Plastic valve to prevent glasses from fogging and to make for a cooler mask Double strap for design for a more secure and comfort fit Long lasting triple shell construction with soft inner lining 90 Day Warranty against any manufacturer defects