Thousands of naked cyclists rode through the streets of Mexico City on Sunday to mark World Naked Bike Ride.
The event is to raise awareness of the importance of cycling for exercise and as a way to reduce fossil fuels.
Organisers said riding naked also highlights the fragility of the human body and the need for drivers to be more careful on busy city streets.
The movement began nine years ago in Canada and is held every year in various cities around the world.
