The Wildlife Conservation Society is teaming up with the Coney Island Polar Bear Club for a fundraising event that takes place on the Circle Line.

Although there is no swimming involved, participants need not keep their pants on. The longer they can withstand the cold in their bathing suits, the more money that is raised for the animals.

The event takes place February 25th. Participation is free. Too comfy in your warm clothes? Price is 20 bucks for spectators or you can sponsor someone by cost per minute.