Throngs of bicyclists hit the streets of Portland Saturday night. Many wore bicycle helmets, but not much else. They rode naked.

Portland is one of 70 cities across the country where cyclists took part in the World Naked Bike Ride.

Cyclists said their goal was to expose their vulnerability on the road, and protest oil dependency and the county’s excessive car culture.

Participants said they received a lot of support from spectators downtown in the form of hooting and hollering.