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Your Guide to EN Standards for Footwear

18 May 2023

Protective gear is paramount in many industrial settings, to significantly reduce injuries within the workplace. Before safety shoes and boots can be sold, they are put through a series of risk assessments and classified under EN standards, with designated symbols such as SRB, WR and HRO to indicate the safety requirements they meet.

Image of EN-certified work boots
EN standards are crucial for identifying whether or not a pair of shoes are safe for occupational or general environments

While it is essential to know what to look for when purchasing safety footwear for work, it's undeniable how confusing EN standards can be. For a better understanding of what each standard entails, we've put together this guide, breaking it down into digestible chunks so that you leave here with a better understanding - and a great, safe pair of shoes!


What Does This Guide Cover?


Do I Need Safety Shoes?

Many workplaces pose the threat of injuries. When risk assessments are being conducted to determine the safety of footwear, many potential hazards are often brought to the surface. Some of these include (but aren't limited):

  • Wet and damp surfaces
  • Uneven terrain
  • Abrasive surfaces
  • Electrostatic build-up
  • Sharp objects (knives, nails, etc.)
  • Falling objects
  • Extreme temperatures/weather conditions
  • Hot and cold materials/surfaces 
  • Outdoor or indoor use

When looking for the perfect safety footwear, it's imperative to know how these shoes can protect you. Some of the things to look out for is whether they shield you from:

  • Thermal risks
  • Mechanical risks
  • Electrical risks
  • Chemical risks
  • General injuries/compromise to your health

EN ISO 20345: General Requirements for Safety Footwear

EN ISO 20345 is the overarching standard at which the safety requirements needed for all work footwear are met. This standard is then divided into several classes, which are rated and determined from a series of risk assessments that are conducted for different parts of the shoe/boot.

Below is a breakdown of the general classification system, categorised by symbols which explain the protective requirements needed to identify safe footwear.

Standard Requirements

SB:

  • Protective toecap

SBP:

  • Protective toecap
  • Penetration resistance

S1:

  • Protective toecap
  • Fully closed heel with energy absorption
  • Antistatic properties
  • Resistance to fuel oil

S2:

  • Protective toecap
  • Fully closed heel with energy absorption
  • Antistatic properties
  • Resistance to fuel oil
  • Penetration resistance
  • Water resistance

S3:

  • Protective toecap
  • Fully closed heel with energy absorption
  • Antistatic properties
  • Resistance to fuel oil
  • Penetration resistance
  • Water resistance
  • Raised/protruding, anti-slip outsoles

S4:

  • Protective toecap
  • Fully closed heel with energy absorption
  • Antistatic properties
  • Resistance to fuel oil
  • Penetration resistance

S5:

  • Protective toecap
  • Fully closed heel with energy absorption
  • Antistatic properties
  • Resistance to fuel oil
  • Penetration resistance
  • Raised/protruding, anti-slip outsoles

Additional Requirements

  • P: Penetration resistance
  • A: Electrical properties/antistatic footwear 
  • E: Energy absorption in the heel region
  • CI: Insulation against cold objects that can cause frostbite (such as ice)
  • HI: Insulation against heat/hot surfaces or materials that can cause burns
  • WR: General water resistance
  • WRU: Water resistance in upper area of the shoe 
  • HRO: Heat-resistant outsole
  • M: Metatarsal protection (padding that protects bones in your feet from shock)
  • FO: Resistance to fuel oil 
  • SRA, SRB, SRC: Slip resistant footwear

Whilst many pairs of safety footwear will indicate their levels of safety using these symbols, they will also be combined with other more specific EN standards - and therefore different symbols.

How Do EN IS0 20345 Shoes Protect My Feet?

These ergonomic features help to protect your feet from the following:

  • Shock absorbent reinforcements to prevent aching feet
  • Antistatic properties prevent injuries caused by electricity such as an electric shock or explosion
  • Resistant features protect against water, oil, static and fuel
  • Insulating properties for heat retention during extreme weather conditions
  • Toe and metatarsal protection preventing injuries to toes and feet

Suitable Applications

Due to their durable, ergonomic design, EN ISO 20345 footwear is suitable for the following applications:

  • Construction
  • Demolition
  • Railway Engineering
  • Plumbing
  • Welding
  • Food Handling Environments
  • Factory/Warehousing
  • All high-risk environments

EN 61340-4-3: Electrical Resistant Footwear

Electrostatic discharge (ESD), or the release of static electricity, happens when two different conductive materials rub together. Whilst often harmless, this event can be hugely detrimental to the wellbeing and safety of operators, as well as to the actual electronics. The EN 61340-4-3 standard refers to footwear that provide effective protection for wearers and electronics against harmful exposure to static electricity.

Dangers of Electrostatic Discharge (ESD)

Whilst ESD can often be harmless, there are many risks that arise from the occurrence of ESD. These risks include:

  • Bodily harm, such as electrocution, shock or burns
  • Damaged electronics, resulting in huge losses for businesses
  • Explosions

Tests for Safe Footwear

Tests for safe footwear are carried out to determine the level of protection users and electrical appliances have against electrostatic discharge. These include:

Electrostatic conductive footwear

  • Test of electrical resistance using < 1 Ω x 10

Electrostatic dissipative footwear

  • Test of electrical resistance using > 1 Ω x 10 and < 1 Ω x 10

How Do EN 61340-4-3 Shoes Protect My Feet?

ESD and anti-static shoes can help to protect users and their environment by:

  • Preventing bodily harm such as burns and electrocution
  • Reducing/prevent the build up of electrical charges in the human body by sending them to the ground
  • Protecting industrial and electrical equipment from permanent damage and explosions
  • Interrupting uncontrolled electrical discharge altogether

Suitable Applications:

  • Electrical Engineering
  • Plumbing
  • Mechanics
  • Pharmaceutical Industries
  • Laboratories
  • Healthcare
  • Manual Work
  • Warehousing
  • Railway Engineering 
  • Construction

EN 13832-2: Chemical Resistant Footwear

When working in environments such as laboratories, factories and warehouses, frequent contact with chemicals can result in splashes and spills. Protection from chemical risks such as splashes and degradation play a big role in your overall safety whilst at work, making EN 13832-2 footwear a necessary and essential investment.

Chemical Burns Causes and Symptoms

Exposure to chemicals is common, and depending on the product/item, can be mostly harmless. Some common examples of day-to-day chemicals include:

  • Bathroom cleaners
  • Bleach
  • Tooth-whitening products
  • Chlorine (used in pools)

However, contact with more corrosive chemicals can cause injuries, whether minor or life threatening. Symptoms of chemical burns usually resemble:

  • Redness or irritation at the burn site
  • Pain or numbness
  • Blisters
  • Dead skin
  • Coughing and/or shortness of breath
  • Muscle spasms or seizures

How Are Chemical Resistant Shoes Measured?

EN 13832-2 is a standard that is applicable to footwear intended to be in close proximity/contact with chemicals for limited amounts of time (continuous contact for up to an hour). To ensure a safety shoe or boot can withstand contact with chemicals without the user coming into harm's way, they're measured by their resistance to damage and degradation from the following chemicals:

Symbol Chemical
B acetone
D dichloromethane
F toluene
G diethylamine
H tetrahydrofuran
I ethyl acetate
J n-heptane
K 30% sodium hydroxide
L 95% sulphuric acid
M 65% nitric acid
N 99% acetic acid
O 25% ammonia solution
P 30% hydrogen peroxide solution
Q isopropanol
R 13% sodium hypochrolite

Only once footwear has been tested against these chemicals can they be certified as safe under the EN 13832-2 standard.

How Does EN 13832-2 Footwear Protect My Feet?

This standard of footwear helps to reduce the injuries to your feet at work from the likes of chemical spills and splashes, with a durable, ergonomic design that helps to prevent burns, pain and irritation to your feet. 

Suitable Applications

  • Laboratories
  • Warehouses
  • Factories
  • Construction Sites
  • Hospitals and Medical Centres
  • Pharmaceutical Industries

EN ISO 20347: Mechanical Resistant Footwear

The EN ISO 20347 standard specifies the need for safety occupational footwear in environments where there are mechanical risks. As many industries come into frequent contact with machinery and other mechanical appliances, the correct footwear can save you from an array of inconvenient injuries, such as impact, shock or compression.

Safety Footwear Requirements

Similarly to the EN ISO 20345 standard, EN ISO 20347 is categorised using symbols which outline the requirements that need to be met for a shoe or boot to be considered safe. Footwear must include:

0B:

  • Conforms to basic requirements of EN ISO 20347 standards

01:

  • Closed seat/heel region
  • Antistatic properties
  • Energy absorbing seat/heel region

02: 

  • Closed seat/heel region
  • Antistatic properties
  • Energy absorbing seat/heel region
  • Water resistance

03:

  • Closed seat/heel region
  • Antistatic properties
  • Energy absorbing seat/heel region
  • Water resistance
  • Penetration resistance
  • Raised/protruding, anti-slip outsoles

04:

  • Closed seat/heel region
  • Antistatic properties
  • Energy absorbing seat/heel region

05:

  • Closed seat/heel region
  • Antistatic properties
  • Energy absorbing seat/heel region
  • Penetration resistance
  • Raised/protruding, anti-slip outsoles

How Does EN ISO 20347 Footwear Protect My Feet?

EN ISO 20347 safety boots and shoes are constructed with features that help to reduce injuries caused by job-related risk factors. These can include protection from:

  • Thermal risks (frostbite or burns)
  • Cuts, penetration and abrasions
  • Wet and slippery environments
  • Broken and strained feet/toes
  • Electrical risks (electrocution or explosions)

Suitable Applications

  • Construction
  • Demolition
  • Railway Engineering
  • Plumbing
  • Welding 
  • Food Handling Environments
  • Factory/Warehousing
  • All high-risk environments

EN ISO 13287: Slip Resistant Footwear

When working in high-risk environments, such as in kitchens or in poor weather conditions, slippery and unsafe terrain is the norm. The EN ISO 13287 standard specifies the requirements that need to be met for occupational and general footwear in order to reduce the amount of injuries that can occur.

Please note that this standard is not applicable to special purpose footwear containing spikes, metal studs etc.

How Is Safety Footwear Classified Under EN ISO 13287?

As with the other EN certifications, a series of tests are run to determine the level of slip resistance of a shoe. Footwear that's certified under EN ISO 13287 will be categorised under the following codes, which indicate which test has been conducted:

Code Test
SRA Tested on ceramic tile soaked with soap solution
SRB Tested on a smooth steel floor with glycerol
SRC Tested under both the above conditions

Please note that these test surfaces don't represent ALL occupational surfaces and therefore slip-resistance tests may need to be carried out in your specific work environment.

What Does EN ISO 13287 Standard Footwear Protect Me From?

Constructed with durable, anti-slip soles, this standard of footwear can protect users from:

  • Slips
  • Skidding
  • Falls
  • Bodily harm (whether minor or serious) 

Suitable Applications

  • Off-Shore Work 
  • Laboratories
  • Kitchens and Restaurants
  • Warehouses
  • Factories
  • Construction Sites
  • Poolside Safeguarding

Final Thoughts

It may be a lot of information to take in, but we hope you leave here today with a better understanding of all of the different footwear EN standards and certifications so that you can get the best performance and protection out of your shoes!