Provides a minimum of 95% filter efficiency against solid and non-oil based aerosol particulates for excellent worker protection. Lightweight constructions help promote greater worker acceptance for all-day wear. Maintenance-free construction features adjustable noseclip with foam strip to reduce the potential for eyewear fogging. Dual head strap for optimum fit and worker comfort. Work applications include grinding, sanding, bagging and other dusty operations. NIOSH Approved. 20 per box. 12 boxes per case. Sold by the box.