High-visibility clothing is a personal protective equipment (PPE) usually used in worksites with high risk of accidents e.g., construction, transportation industries, emergency services like firefighters, police, and emergency medical services.

In roadworks, >40% of fatalities are linked to low conspicuity (or low noticeability) of pedestrian workers.

High visibility jackers have been shown to reduce cycling accidents by 55%.

To prevent accidents, they improve visibility of people at a distance, against a complex visual background, in conditions of poor visibility or where they may appear suddenly in path of danger.

High-visibility clothing or ‘high vis’ is a luminescent clothing like a vest or jackets. They use fluorescence (boosts visibility during daylight and night) and retroreflective materials (for darker hours).