The most frequently discussed type of respirator mask is N95. This is an American standard administered by NIOSH, which is part of the Center for Disease Control (CDC).
Europe uses two different standards. The FFP (filtering face piece) comes from EN standard 149: 2001. EN 143 standard covers P1 / P2 / P3 values. Both standards are provided by CEN (European Standardization Committee).
The filtering capacity of different respirators for 0.3 micron and larger particles is as follows;
FFP1 & P1’de en az %80
FFP2 & P2’de en az %94
N95’de en az %95
N99 & FFP3’de en az %99
P3’de en az %99.95
N100’de en az %99.97
As seen above, FFP2 & P2 provide the closest protection to N95. These masks are called N95 in America, KN95 in China and FFP2 in Europe. Alvent FFP2 masks meet all FFP1, FFP2 and FFP3 standards.