EN 342 - Protection against cold environment
Protective clothing certified according to EN 342 gives the wearer protection against cold environment. Requirements are set on thermal insulation and air permeability. Resistance to water penetration is an optional requirement.
A = Thermal insulation, measured value
B = Air permeability class (1 – 3 where is best)
C = Resistance to water penetration class (optional) (1-2 where 2 is best)