The BLS 301 P2 NR Prefilter is a compact, lightweight particulate prefilter designed to snap directly onto BLS gas/vapor cartridges (200 series). It enhances protection against hazardous dusts, mist particles, and fumes, such as metal powders, bio-contaminants, and aerosols. The filter employs polypropylene fiber media for efficient mechanical and electrostatic capture of particulates. The "NR" designation means it's typically single-use, though newer "P2" versions meet EN 143:2021 standards for reuse. This prefilter significantly extends the service life of more expensive gas/vapor cartridges — especially useful during tasks like spray painting where particulate loading can clog main cartridges quickly. Key Features: High-Particulate Filtration (P2) — captures hazardous dusts, mists, and fumes effectively; Lightweight Design — only ~5.5g, minimizing respiratory burden; Self-Locking Bayonet Fit — snaps onto compatible BLS gas filters securely without additional hardware; Reusable Option Available — new P2 variant allows multi-shift use under updated standards; Cost-Efficient — protects and extends the life of gas cartridges in particulate-heavy environments. Industrial Uses / Applications: Ideal for environments where both gas and particulate hazards exist — chemical handling with airborne dust and solvent vapors; spray painting and coating operations; laboratory and pharmaceutical setups with bioaerosol exposure; metalworking (grinding, welding, machining); general industrial maintenance and emergency response tasks.