The International Organization for Standardization released on 28th June 2013 the new EN ISO 20471:2013 standard for the test methods and requirements of high visibility clothing. All EEC Type Examination Certificates based on EN 471 for high visibility clothing became invalid on 1st October 2013 regardless of any other mentioned validity date. Requirements are included for color, retro reflection and Physiological performance as well as for the minimum areas of visible material in high visibility clothing.
EN 20471 imposes requirements on visible workwear for employees in high-risk areas. The employees will be visible and safe at night, during the day, and from all angles. There are three classes which are related to risk assessment and are defined by the minimum areas of background fluorescent and retro-reflective material.
CLASS 1 performance provides less visibility than Class 2 or 3, but can be a good alternative for low risk duties and environments. It requires a minimum of 0.14m² of background material and 0.10m² of retro reflective material.
CLASS 2 performance is of intermediate level, requires a minimum of 0.50m² of background material and 0.13m² of retro reflective material.
CLASS 3 performance provide the highest level of conspicuity. A Class 3 garment is required to cover the torso and have sleeves with reflective bands or/and trouser legs with reflective bands. It requires a minimum of 0.80m² of background material and 0.20m² of retro material.