Hundreds of people bared their briefs Saturday so others wouldn't have to bear the burden of "below the belt" cancers.

The Underwear Affair took place at Carleton University's Alumni Park; a pants-less run through Ottawa to fight testicular, ovarian, colorectal and other cancers.

"We wanted to support (fighting) cancer and have an excuse to look as ridiculous as we do," said one participant.

The national event is especially poignant in Ontario as prostate and colorectal cancers are two of the most common cancers in the province.

"For myself, my father suffers from prostate cancer, he went through treatment and survived," said participant Clayton Thorpelson. "Everyone just jumped on board for support."

The support was felt for the Ottawa Regional Cancer Foundation – the 700 participants who "undressed to impress" was double last year's number, and the event raised $334,000.

"I get such an amazing high with activities like today where people rally together," said Linda Egan, President of the Ottawa Regional Cancer Foundation.

With a report from CTV Ottawa's Stefanie Masotti