What Are The New Categories Introduced In En Iso 20345:2022? S6 & S7 For True Waterproof Protection

The new primary safety footwear categories introduced in EN ISO 20345:2022 are S6 and S7. These classifications were created to specifically address the need for footwear that is not just water-resistant, but fully waterproof. Category S6 is comparable to the S2 standard but with guaranteed waterproofness, while S7 is the waterproof equivalent of the S3 standard, also including midsole penetration resistance.

The core change in the 2022 standard is the creation of a clear distinction between "water resistance," which only applies to the upper material, and true "waterproofness," which tests the entire shoe as a sealed unit. This provides a more accurate and reliable classification for professionals working in consistently wet environments.

What are the new categories introduced in EN ISO 20345:2022? S6 & S7 for True Waterproof Protection

The Evolution from Water Resistance to Waterproofness

The introduction of S6 and S7 categories addresses a long-standing ambiguity in safety footwear standards. Previously, the classifications for water protection could be misleading, as they didn't guarantee a completely dry foot in demanding conditions.

The Traditional "Water Resistant Upper" in S2 & S3

Under the old standard, S2 and S3 footwear included a requirement for a "Water Resistant Upper" (WRU). This test, however, only assessed the ability of the upper material itself to resist water penetration.

This meant that water could still potentially enter the shoe through seams, the tongue, or the join between the upper and the sole, especially during prolonged exposure or immersion.

The New Standard: Integrated Waterproofness in S6 & S7

The new S6 and S7 categories mandate a higher level of protection known as Water Penetration and Absorption (WPA).

This involves a dynamic test where the entire shoe is submerged in water and subjected to flexing motions. To pass, the shoe must prevent any water from entering, ensuring the entire product is waterproof, not just its materials.

A Closer Look at the New Categories

The new categories build directly upon the foundations of the familiar S2 and S3 classifications, adding the critical WPA waterproofness requirement.

Category S6: The Waterproof Evolution of S2

A shoe classified as S6 includes all the requirements of the S2 category:

Protective toecap
Antistatic properties
Fully enclosed heel
Energy absorption in the heel region
Plus: The new WPA requirement for complete waterproofness.

Category S7: The Waterproof Evolution of S3

A shoe classified as S7 includes all the requirements of the S3 category:

All features of an S2 shoe
Midsole penetration resistance
Cleated outsole
Plus: The new WPA requirement for complete waterproofness.

The penetration resistance in S7 boots can be achieved with different materials, leading to variants like S7L (non-metallic anti-perforation sole) and S7S (steel anti-perforation sole).

Key Associated Changes in EN ISO 20345:2022

Beyond the new categories, the 2022 update introduced other significant changes that professionals must be aware of when specifying footwear.

The Revision of Slip Resistance (SR)

The previous SRA, SRB, and SRC markings have been abolished. All safety footwear certified under the new standard must pass a basic slip resistance test on a ceramic tile surface with a soap solution.

A new, optional marking, SR, can be achieved if the footwear also passes a more demanding test on a ceramic tile with glycerin. This indicates a higher level of slip resistance for particularly hazardous environments.

Fuel/Oil Resistance (FO) Becomes Optional

Previously, fuel and oil resistance (FO) was a mandatory requirement for S1, S2, and S3 footwear. Under the 2022 standard, it has become an optional feature.

If your risk assessment identifies a need for resistance to fuel or oil, you must now specifically ensure the footwear carries the FO marking.

New Optional Requirements

The update also introduced several new optional codes to specify protection against particular hazards. These include:

SC: Scuff cap abrasion resistance
LG: Ladder grip, for enhanced stability on ladders

Making the Right Choice for Your Environment

Understanding these changes is crucial for selecting the appropriate protection. Your choice should be driven by a clear assessment of the specific hazards in your workplace.

If your team works in consistently wet or submerged conditions: Choose footwear rated S6 or S7 to ensure complete waterproof protection.
If your primary need is protection from occasional splashes or light rain: Traditional S2 or S3 rated footwear may still be sufficient for your needs.
If slip hazards on slick or oily surfaces are your main concern: Look for the optional SR marking, regardless of the S-category, for the highest level of certified grip.
If your environment involves exposure to hydrocarbons: You must now specifically select footwear with the optional FO marking, as it is no longer a default feature.

By understanding the principles behind these new standards, you can make an informed choice that ensures both compliance and true safety.

Summary Table:

New Category	Equivalent To	Key Feature
S6	S2 (Protective toecap, antistatic, heel protection)	Plus Full Waterproofness (WPA)
S7	S3 (S2 features + midsole penetration resistance)	Plus Full Waterproofness (WPA)
SR	(Optional)	Higher Slip Resistance
FO	(Optional)	Fuel/Oil Resistance (now optional)

Ensure your team has the right protection for wet and hazardous conditions.

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