3M Household Half-Face Mask Respirator 1 pk3M Household Half Face Mask Respirator 1 pk Brand Name: 3M NIOSH Rating: P100 Respirator Type: Multi Purpose Product Type: Half Face Respirator Valved: Yes Color: Gray Size: M Number in Package: 1 pc. Quick Release: No Filtration: 95 percent Reusable: Yes Packaging Type: Clamshell Medium Size NIOSH Approved Provides at least 99. 7% filtration efficiency against solid and liquid aerosols, including oils Replacement Respirator Supply Kit (Ace No.