UNI EN 20471 specifies requirements for garments that signal the wearer's presence in hazardous situations in any daylight condition and with vehicle headlights in the dark (including the performance requirements related to colour, retro-reflection, minimum areas and availability of materials, test methods to test the effectiveness of materials and entire devices).
The technical standard is structured primarily into the following parts:
The garments taken into account are:
Warning clothing is grouped into three classes, each of which must have minimum areas of incorporated materials, divided between:
The high visibility vests and braces must be made of materials that comply with class 2, and have the following minimum areas of visible material:
The arrangement must conform to what is shown in INFORMATION APPENDIX B of the standard.
The retro-reflective material band should be at least 50 mm wide.
The undervests must have either:
The undervests must be so constructed that, when worn by a person of the size for which they were designed, the side openings are not more than 50 mm horizontally.
The braces should include a retro-reflective band around the waist and other retro-reflective bands, passing over each shoulder, that join the horizontal band from front to back; the bands must be at least 30 mm wide.
Sizes must be in accordance with the requirements of EN 340:1993.
The colours may be three, namely:
and must comply with the trichromaticity coordinates and luminance factor referred to SCHEDULE II of the harmonised standard.If the bottom material is for combined performance (i.e. presenting the properties of the underlying material and those of the retro-reflective material), the values to be respected are those of SCHEDULE III.
With regard to parameters such as:
it is necessary to refer to the points from 5.2 to 5.7 of the harmonised standard.
The washing or cleaning instructions must be disclosed in accordance with ISO 3758.The maximum number of processes must be shown after the word "max".
Each signalling garment must be marked.
The marking must be:
Must include the following information:
Instructions for use
The ANCCP Certification Agency offers its service of verification and control of high-visibility clothing subject to washing and maintenance, certifying that the process of verification and control of high-visibility clothing subject to washing and maintenance is in accordance with standard UNI EN 20471.