Level 3 - 3ply Mask * Blue * Bx/50 * Adjustable nose clips * The 3 layer design provides BFE and PFE > 85% * One size fits all * Ultrasonically welded earloops stay firmly attached * Tested for quality * Outer and inner layers - spunbond nonwoven polypropylene * Filter - meltblown nonwoven polypropylene * Straps - polyester elastic cord * This mask contains no components made from natural rubber latex * ASTM F2100 - Level 3 *