People around the country will be running in their underwear next month, and it's for a good cause

Thousands of people across the nation will be running through their cities in one of the coldest months of the year next month — wearing nothing but their underwear. Cupid's Undie Run will take place in 37 cities throughout the month of February to raise awareness for a childhood genetic disorder called neurofibromatosis. NF is a genetic disorder that causes tumors to grow on nerve tissue throughout the body and can cause blindness, deafness, learning disabilities and severe chronic pain.

There is currently no cure for the condition, but Cupid Undie Run's Public Relations consultant Nicole Bryant told TheBlaze that the organization raised a total of $3.7 million last year and are hoping to turn that into $4 million this year.

"Currently, there is no cure for NF and there are frighteningly few treatment options, but with the $3.5 million (& counting) we raised in 2016 – adding up to almost $11.5 million over the years – we are getting close," Bryant said in a statement provided to TheBlaze.

The fun run is one mile long, Valentine's Day themed, and is accompanied by a day full of festivities and prizes. And the reason for the lack of clothes? "We run in our undies because people with NF can’t cover up their tumors," the organization said.

All money raised benefits The Children's Tumor Foundation. Since the fun run's inception seven years ago, there has been more NF research than the previous 20 years, and Cupid Charities says there are now over 33 clinical drug trials for the condition.

For those looking to fulfill a New Year's resolution to exercise more, the Cupid's Undie Run offers exercise opportunity and a chance to win fun prizes, all while contributing to a worthwhile charity.