Footwear for professional use according to EN ISO 20345: 2011 is marked by an "S" (from English Safety = Safety) as Safety Footwear. The so-called "basic" shoe is marked with the letters "SB" (S = Security - "B" = Base). This shoe must have the following minimum requirements: • height of the upper • tip (minimum length, minimum support base) • upper in "crust" leather, microfibre and similar • front lining • insole • sole in any type of material, can be smooth • the upper, in the lower shoe, can be opened in the heel area. In the "SB" Footwear the following requirements are never understood if not specified in detail: • anti-static • energy absorption of the heel • dynamic waterproofing of the upper • sole with dowels • back lining • water-repellent upper • foil or anti-friction fabric. The following is the meaning of the stamping that you can find on the shoe.

Conformity marking Name of the manufacturer Date of production
CE U-POWER 01/2018
EN ISO 20345:2011 S3 SRC HRO HI 000000 - Reflex
European standard Protection class Sliding resistance requirement Additional requirements Product code

The year of application of the CE marking and the identification number of the laboratory which certified its suitability have been deleted with the D.L. of 02/01/1997 n ° 10. The identification number of the laboratory must be highlighted on the usage note. - From 01/06/98 with the entry into force of EN 345: 1 the indication of the Country of the Producer is eliminated.

In addition to the Basic Requirements, others are provided, as indicated in the following table:

PROTECTION CLASS SYMBOL EN ISO 20345:2011 EN ISO 20347:2012 EN ISO 20345:2011 EN ISO 20347:2012 Minimum values ​​required
SB S1 S2 S3 0B 01 02 03 S4 S5 04 05
Closed heel area 0 0
Shock resistant to 200J
A Antistatic footwear 0 0 between 1x10 5 Ω and 1x10 9 Ω
E Heel area energy absorption 0 0 ≥ 20 Joule
FO ex ORO Walking sole surface resistant to hydrocarbons 0 0 0 0 0 0 0 always present by EN ISO 20345:2011 and by EN ISO 20346:2011 but to be specified when required by EN ISO 20347:2012
WRU Water resistant upper material 0 0 > 60 mins - Absorbance < 30%
P Pierce resistant midsole 0 0 0 0 0 0 ≥ 1100 N.
CI Thermal cold insulation of the sole 0 0 0 0 0 0 0 0 0 0 0 0 by temperature < 10°C
HI Thermal heat insulation of the sole 0 0 0 0 0 0 0 0 0 0 0 0 by temperature > 22°C
C Thermal heat insulation of the sole 0 0 < 1x105 OHM
HRO Walking sole surface heat resistance to temperature on contact 0 0 0 0 0 0 0 0 0 0 0 0
AN Ankle protection 0 0 0 0 0 0 0 0 0 0 0 0 average value > 20kN

Electrically insulating shoe (Dielectric) 0 0 Class 00 or Class 0 - CEI EN 50321 standard
WR Water resistant shoes 0 0 0 0 0 0 0 0 no penetration within first 15 mins. After 100 flex should non penetrate more than 3 square Cm
M Shoe with metatarsal protection 0 0 0 0 0 0 height after shock > 40 mm (tg 42)
WG Protection for small splashes of molten metal for welding operations
CR Cut resistant upper 0 0 0 0 0 0 l factor > 2,5
SRC (SRA + SRB) Anti-slip requirement
RS Quick extraction (symbol U-Power)

= = Required requirement for the indicated category
0 = = Optional requirement added to the mandatory ones, if marked on the marking
= = Not mandatory requirement, check footwear stamping

Below the sole the following information is indicated: - fit. On the bellows or the tongue of the shoe are affixed: - manufacturer's mark - the item code - the month and year of manufacture - the following markings: see conformity marking CE

Safety cateogires and symbols used
SB BASIC requirements
S1/01 BASIC requirements closed back (also low footwear)
FO resistance to hydrocarbons
heel energy absorption capacity
S2/02 BASE + S1 requirements integrated by: dynamic impermeability of the upper use material
S3/03 BASE + S2 requirements integrated by: anti-foil lamina
sole with dowels
S4/04 Basic requirements integrated by: antistatic
Heel area energy absorption
FO resistance to hydrocarbons
S5 S4 requirements integrated by: anti-foil lamina
sole with dowels
SYMBOLS USED European standards requirements
Test floor: ceramics
Lubricant: water + detergent
≥ 0,32 Flat
≥ 0,28 Heel (contact angle 7°)
Test floor: steel
Lubricant: glycerin
≥ 0,18 Flat
≥ 0,13 Heel (contact angle 7°)
SRC (SRA+SRB) Both tests methods applied
These shoes have been designed to allow continuous and controlled dissipation within safety values ​​of the electrostatic charges present on the operator's body in order to protect electronic devices sensitive to electrostatic phenomena. The recommended "EPA" resistance to ground is ≤ 3.5x107Ω. Considering that the measurements are made with the footwear worn by the user, the values ​​obtained can vary considerably from person to person and according to environmental conditions, since the electrical resistance of the human body is variable.
EN ISO 20346:2011

Protective footwear under EN ISO 20346: 2011 are called "Protective footwear". They are essentially identical to safety footwear. The only differences are the following:

  • Impact protection tip with 100 J energy and 10 KN compression
  • they are marked with "P" (from the English word "protective") instead of the "S" (Safety shoes).

N.B.: use in all workplaces where 100 J protection is sufficient

EN ISO 20347:2012

Work shoes under EN ISO 20347: 2012 are called "work shoes" or "professional". They are essentially identical to the footwear analyzed previously. They differ from not having a protection tip and the marking is done by replacing the letters "S" and "P" with "O" (from English "occupational" = work) and therefore identified with 01, 02, 03. The resistance to non-obligatory FO hydrocarbons must be indicated on the marking.


EN ISO 20349:2010: Small splashes of molten metal like those produced during welding operations and related processes.
EN ISO 20344:2011: Test methodology and general requirements.
EN ISO 20345:2011: Safety shoe specifications with 200 J toe resistance.
EN ISO 20346:2011: Specifications of protective footwear with 100 J toe resistance.
EN ISO 20347:2012: Specifications of "Work footwear" or "professional". No specific resistance of the tip.
UNI 11583:2015: The UNI 11583: 2015 compliant calibres meet the requirements of the UNI 11583: 2015 standard which specifies the requirements for safety, protection and work footwear for professional use for work on inclined roofs.

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