EN 149 is a European standard that specifies the minimum requirements for filtering half masks used as respiratory protective devices against particles. These masks are commonly known as filtering facepiece respirators (FFP), and they are essential for protecting the wearer from inhaling harmful particles such as dust, mist, fumes, and aerosols.

Filtration efficiency, Inward Leakage, Breathing Resilience, Compatibility with eye protection and field of vision are all factors taken into account that must be met with this standard.