Safety vests come in various classes to suit different risk levels. Class 1 vests are for low-risk areas with traffic under 25 mph, offering minimal reflective material. Class 2 vests cater to higher risk environments, such as construction zones with traffic up to 50 mph, featuring increased visibility. Class 3 vests are for high-risk areas, like highways, where traffic exceeds 50 mph, providing the maximum reflective coverage.