There were no cold feet at this polar plunge. Fearless participants in the Cool School Plunge this month donned creative costumes (or stripped down to their skivvies), then jumped into a hole cut in the ice on Lake Calhoun in Minneapolis.

Each jumper raised a minimum of $75 to take part in the goose-bump-producing event, which raised funds for Special Olympics Minnesota. Teams of students from Minnesota middle and high schools challenged one another to be the “coolest” in town.

With the temperature at 28 degrees, it turned out that all of the jumpers were cool — very cool.