Certified workwear for protection of High-Visibility Protective clothing certified according to EN ISO 20471, which specifies the requirements for High-Visibility. The combination of fluorescent material with reflective tape should provide the visibility of the user in all lighting conditions, both in daylight and under the illumination of headlights in the dark. The number (x) next to the pictogram indicates which class is related to the surface of both fluorescent and reflective material. The classification goes from 1-3, where 3 is the highest.