NIOSH-APPROVED N100 for at least 99.97 percent filtration efficiency against solid and liquid aerosols that do not contain oil FOR WORKPLACE/OCCUPATIONAL USE ONLY 3M COOL FLOW VALVE helps reduce heat build-up inside the respirator ADVANCED FILTER MEDIA for easier breathing ADJUSTABLE NOSECLIP helps ensure a custom, secure seal SOFT FOAM FACESEAL that conforms to the face and helps provide a comfortable and secure seal ASIN B0FD8R22BF