Hundreds of bicyclists rode down streets in Mexico City in the nude to promote exercise and the reduction of dependence on fossil fuels, organizers said.
In addition to environmental and health concerns, the international World Naked Bike Ride calls for respect for cyclists and pedestrians on the street.
"Go naked symbolizes the way you feel about a cyclist traffic in the city," a statement from the movement said.
Mexico City, Guadalajara and Leon top the list of cities with the highest development of urban cycling in Mexico, CNNMexico reported.
Another naked bike ride is scheduled for June 15 in Puebla.