EN ISO 20345 standard specifies basic and optional requirements for safety footwear used for general purpose. It includes, for example, mechanical risks, slip resistance, thermal risks, ergonomic behaviour.
The basic requirements that safety shoes of all protection classes should fulfill cover among others following:
    • height of the upper and design of the seat region;
    • sole performance, toe protection, leakproofness, specific ergonomic features;
    • thickness, tear strength, tensile properties, flexing resistance, water wapour permeability of the upper;
    • tear strength, abrasion resistance, water wapour permeability of the lining;
    • tear strength, abrasion resistance, flexing resistance of the outsole and interlayer bond strength.

Footwear that fulfill only above mentioned requirements are ranked as SB protection class. 
In the table below you can find requirements for further protection classes:

PROTECTION CLASS

REQUIREMENTS

SB

Basic requirements (see above)

S1

As SB, plus

Closed seat region

Antistatic properties

Energy absorption of seat region

Resistance to fuel oil

S1P

As S1, plus:

Penetration resistance

S2

As S1, plus:

Water penetration and absorption

S3

As S2, plus:

Penetration resistance

Cleated outsole


Please note that every protection class was developed for special conditions: for example, for job in e.g. logistics in a warehouse without any work to do outdoors the S1P class would be a perfect solution as it offers great breathability.

The same is valid for the slip resistance of the footwear. The SRC class is a versatile solution, but maybe SRA or SRB will be enough for you? For more information check the table below:



LABEL

CHARACTERISTICS TESTED

TEST CONDITIONS

FRICTION COEFFICIENT

SRA

Slip resistance on ceramic tile floors with sodium lauryl sulfate solution (SLS)

Forward slip of the heel
Forward slip on a flat surface

No less than 0.28
No less than 0.32

SRB

Slip resistance on steel floors with glycerol

Forward slip of the heel
Forward slip on a flat surface

No less than 0.13
No less than 0.18

SRC

Slip resistance on ceramic tile floors with sodium lauryl sulfate solution and on steel floors with glycerol

Includes all test conditions cited under a. and b.




There are additional protection features that the safety footwear can offer. For more information check the table below:

Additional requirements for special applications with corresponding symbols

SYMBOL

RISK COVERED

EN ISO 20345

EN ISO 20347

SB

S1

S2

S3

S5

OB

O1

O2

O3

Basic

P

Penetration resistance*

A

Antistatic footwear

E

Energy absorption around heel

HI

Heat insulation

CI

Cold insulation

WRU

Water resistance of upper

HRO

Heat resistance of outsole (+300 °C/min)

WR

Whole shoe waterproof

M

Metatarsal protection

FO

Resistance to oil and petrol


 => Meets the specific requirement
 => Requirement can be met but is not stipulated