Specifically designed to offer respiratory protection in welding operations. Efficient particulate filter resists clogging for extended use against welding fumes. Activated carbon layer filters out Ozone generated by MIG, TIG and ARC welding operations. 3M™ Cool Flow™ valve reduces heat build-up to offer comfortable protection. Flame retardant - the specially treated outer shell offers increased flame retardancy. Welding shields - low profile design for compatibility with welding shields. Blue colour coded lettering denotes FFP2 protection level.