PHILADELPHIA (CBS) — Several hundred people got into the Valentine’s Day spirit by stripping down to their underwear and running around the block, but they did it for a good cause.

People wore what you’d expect them to wear at an event called the 4th annual Cupid’s Undie Run.

READ MORE: Philadelphia School District Students, Staff To Resume Masking As COVID Cases Continue To Rise In City

Cupid’s Undies Run 2018 – Credit: Hadas Kuznits

“They’re wearing barely nothing,” one participant said. “Underwear, bras and underwear for the gentlemen!”

“Hopefully no one judges me and it just feels good to be in my Wonder Woman underoos,” another woman added.

ALSO READ: Crowdfunding Campaign Aims To Super Size Eagles Mural

READ MORE: Marquis Fletcher Charged With Murder For Shooting, Killing Woman In Camden

The event wasn’t just about stripping down, it was a fundraiser for children with Neurofibromatosis.

“Everyone raises money to get here, you come in, you try to raise as much money as you can, you raise awareness, you raise money and you come here in your underwear and then you run around the block,” one woman said.

Cupid’s Undies Run 2018 – Credit: Hadas Kuznits

Dawn from South Philadelphia suffers from this disease, characterized by tumors on your nerves.

“It means the world,” she said. “I’ve had 34 surgeries. I’ve had one four-weeks-ago and knowing that people are doing this, I know that a cure is near.”

MORE NEWS: Philadelphia Weather: Tornado Watch Issued For Parts Of Pennsylvania, Delaware And New Jersey As Gusty Thunderstorms Head Towards Region