The 3M™ 2135 Particulate Filter is a lightweight P3 R filter designed to provide respiratory protection against fine dusts, oil and water-based mists, and metal fumes. Compatible with selected 3M™ reusable half and full face respirators using the secure bayonet connection system, the filter offers low breathing resistance and a balanced lightweight design for improved wearer comfort. Ideal for welding, sanding, grinding, pharmaceutical, construction, and industrial applications, the 2135 filter helps provide reliable high-level particulate protection in demanding working environments.