When temperatures drop below -5°C, the wrong clothing can put your team at risk.
EN 342:2017 is the international standard for PPE designed to protect workers in cold conditions. Choosing compliant, tested gear is essential for safety, comfort, and legal compliance.
Look for workwear marked with EN 342:2017 ratings like 0.310, 2, 1, which show how well the clothing protects against cold, wind, and water.
WHAT EN 342:2017 COVERS
Clothing certified under EN 342:2017 is tested for:
Thermal insulation - how well it keeps in body heat.
Air permeability - how effectively it blocks wind and cold air.
Water penetration resistance - optional protection against water penetration.
These tests make sure your team stays warm, dry, and protected in harsh conditions.
EN 342:2017 RATINGS EXPLAINED
TEST
WHAT IT MEASURES
RATING SCALE
Thermal insulation (Icler)
Heat retention of the clothing
Decimal value, e.g., 0.310 - higher means warmer
Air permeability
Resistance to air passing through the fabric
Class 1 to 3 - with 3 offering the best windproofing
Water resistance
Protection against water penetration (optional)
Class 0 or 1 - with 1 meaning water resistant
EXAMPLE:A jacket rated EN 342:2017 0.310, 2, 1 provides good insulation, solid wind protection, and water resistance.
Explore our full range of EN 342:2017 certifiedjackets and bodywarmers to find the right PPE for your team.
Not sure which cold weather attire is right for your team?
ISO 20345:2022+A1:2024 - COLD WEATHER SAFETY FOOTWEAR
Cold feet are unsafe feet. Safety footwear needs to do more than protect against impact - they must also keep feet warm, dry, and stable in freezing conditions.
That’s where ISO 20345:2022+A1:2024 comes in.
It’s the international standard for safety boots that combine cold weather protection with the core features of compliant footwear.
What to look for:
WR - Water-resistant materials
CI - Cold insulation tested to -17°C
S3 - Water-resistant plus an anti-penetration sole
SRC - Slip resistance on ceramic and steel surfaces
ISO 20345:2022+A1:2024 RATINGS EXPLAINED
MARKING
MEANING
CI
Boots keep feet at 10°C or warmer after 30 minutes in -17 °C conditions
WR
Water-resistant
S3
Water-resistant with anti-penetration sole
SRC
Slip-resistant on ceramic and steel surfaces
DID YOU KNOW? SMI stocks a full range of ISO 20345:2022+A1:2024cold weather boots.