EN 342:2004

Certified and approved garments provide protection against cold weather, i.e. thermal insulation properties and air permeability.

A cold climate is characterised by a combination of moisture and a temperature below -5°. EN 342 indicates the value of the resulting effective thermal insulation for a wearer. It indicates the lowest temperature at which the body can maintain thermal neutral conditions indefinitely (8 hours) for light and medium duty tasks. It also indicates the lowest temperature at which body cooling is sustained at an acceptable level for 1 hour, while the wearer is performing light and medium duty tasks.

a  The garment’s thermal insulation properties
b  The thermal insulation standing still (optional)
c  Air permeability (1–3)
d Resistance to water penetration (optional)