While most people are bundling up to stay warm, residents of Chicago's Boystown neighborhood stripped to their skivvies for the city's seventh annual Santa Speedo Run.

"The Race for Naughty and Nice" found more than 200 Saint Nicks in their underwear Saturday, singing "Jingle Balls" to a crowd of more than 1,000 spectators before taking off on a mile-long dash.

Proceeds from the event went to Center on Halsted's "Get to Zero" program, which is working with the Chicago Department of Public Health to lower new HIV infections and raise treatment levels by 2027.

The race saw more runners and spectators than any year prior—and broke fundraising records, too: More than $70,000 was raised.

Check Sidetrack Chicago's photos from the 2017 Santa Speedo Run below.