Standard EN ISO 20345
The EN ISO 20345 standard specifies basic and additional requirements for safety footwear. Baak safety shoes are naturally manufactured in accordance with the specifications of EN ISO 20345 and therefore offer the wearer the highest possible level of protection.
Safety shoes in accordance with EN ISO 20345 protect the wearer from bumps, pinching, falling objects, the penetration of sharp objects and heat or cold.

Standard EN ISO 20345:2022
The most important changes to EN ISO 20345:2022 at a glance
All changes at a glance
Previously, the slip resistance test had to pass either SRA (test of cleaning agent on tile) or SRB (test of glycerine on steel).
The "SRA" label will no longer exist in the future; this test will now become a basic requirement for all safety shoes, and every safety shoe will have to pass SRA in the future.
For special requirements, however, it is now also possible to dispense with slip resistance tests, in which case the shoes must be marked with Ø. The "SRB" requirement (glycerine/oil on steel) is no longer applicable.
A new additional requirement will be the glycerine/oil on tile test, which will then be labeled "SR".
In future, the puncture resistance of textile material can be tested with 2 different nails. One with a thick nail with a diameter of 4.5 mm and one with a thin nail with a diameter of 3 mm. The manufacturer can decide which test he wants to certify.
Nothing changes for steel midsoles. This change also means that there are new markings for shoes with puncture resistance.
For S3:
- S3 (metallic puncture resistance)
- S3L (textile puncture resistance) with thick (Large) nail tested
- S3S (textile puncture resistance) with thin (Small) nail tested
For S1 then correspondingly for metallic puncture resistance S1P, with textile puncture resistance then analogously S1PL or S1PS.
The textile penetration resistance we use meets the requirements for both S and L, but as only one marking is possible, we mark our penetration-resistant shoes with S.
The designation WRU (Water Resistant Upper) is changed to WPA (Water Penetration and Absorption)
The background to this is that the name is misleading. It is not the water-repellent properties of the upper that are tested (which is what WRU means), but the water penetration and absorption of the material (WPA).
- Category S2 shoes that are waterproof are now category S6 (formerly S2 WR)
- Category S3 shoes that are waterproof are now category S7 (formerly S3 WR)
In the old standard, FO was part of S1, S2, S3 etc. This is no longer the case.
FO is now an additional requirement, such as HRO.
This means that S1 shoes with oil- and petrol-resistant soles are labeled as S1 FO.
The new standard includes the new SC requirement for overcaps.
This refers to additional materials that are applied to protect the cap area.
Frequently used, foamed overcaps, due to This does not refer to a raised midsole and cannot be certified as SC.
The cap must not have a hole after 8000 abrasion cycles.
Also new is the additional requirement LG, which describes the design of the heel and the joint area to ensure a secure hold on ladders.
Orthopaedic changes to the shoe are now part of the standard, and a distinction is made between 3 types.
- Type 1: Equipped with insoles
- Type 2: Finishing in the shoe base
- Type 3: Custom-made safety shoes
There is no corresponding marking on the shoe.
| Additional requirements | Icon |
|---|---|
| Complete shoe | |
| P | Passage inhibition |
| C | Conductive shoes |
| A | Antistatic shoes |
| HI | Thermal insulation |
| CI | Cold insulation |
| E | Energy absorption capacity in the heel area |
| WR | Watertightness |
| M | Metatarsal protection |
| ON | Ankle protection |
| SR | Slip resistance: oil on tile |
| Shoe upper | |
| EPA | Water penetration and absorption |
| CR | Cut protection |
| SC | Abrasion-resistant overcap |
| Outsole | |
| LG | Hold on to ladders |
| HRO | Behavior towards contact heat |
| FO | Oil and gasoline resistance |
EN ISO 20345:2011
| Category | Basic requirement | Additional requirement |
|---|---|---|
| SB | ||
| S1 | ✔ | Closed heel area, antistatic, energy absorption capacity in the heel area |
| S2 | ✔ | As S1, plus water penetration and absorption of the upper part of the shoe |
| S3 | ✔ | Like S2, additional penetration resistance, profiled outsole |
| Safety shoes EN ISO 20345:2011 | S1 | S2 | S3 |
|---|---|---|---|
| Basic requirement | ✔ | ✔ | ✔ |
| Closed heel area | ✔ | ✔ | ✔ |
| Fuel resistance of the sole | ✔ | ✔ | ✔ |
| Antistatic properties | ✔ | ✔ | ✔ |
| Energy absorption capacity in the heel area | ✔ | ✔ | ✔ |
| Water penetration/absorption | ✔ | ✔ | |
| Penetration safety | ✔ | ||
| Profiled outsole | ✔ |
| Icon | Requirement/property | Required protection |
|---|---|---|
| P | Penetration resistance of the outsole | ↑ 1100 N |
| E | Energy absorption in the heel area | ↑ 20 joules |
| A | Antistatic shoe | Between 0.1 and 1000 MΩ |
| C | Conductive shoes | ↓ 0.1 MΩ |
| WR | Waterproofness of the entire shoe | |
| WRU | Water penetration and absorption of the upper material | ↑ 60 min. |
| HI | Thermal insulation | Test at 150 °C |
| CI | Cold insulation | Test at -20 °C |
| HRO | Behavior towards contact heat | Test at 300 °C |
| M | Metatarsal protection | |
| ON | Ankle protection | |
| CR | Cut resistance | |
| SRA | Slip resistance on ceramic tiles/cleaning agents | |
| SRB | Slip resistance on steel plate/glycerine | |
| SRC | SRA + SRB |