It will be a first time in Brussels after over 400 confirmed their interest in the unusual events. Last year, more than 4,000 people participated in the twelfth edition in New York.
The idea is simple. You put on your warmest winter underwear, underpants, boxer briefs or panties and you walk in the subway.
Those wishing to join are to bring clothes and underwear hot enough and a bag to store their pants. Participants are asked to not forget to bring a ticket and not down on the dock directly in underwear, underpants, briefs or panties, but wait to be mounted in the train before remove their pants.