PHILADELPHIA AP – Two mothers filed a free-speech lawsuit Monday against a Pennsylvania school district that suspended their daughters for wearing the popular “I heart boobies” bracelets.

The American Civil Liberties Union believes the lawsuit is the first in the country over a school’s ban on the $4 bracelets, which are designed to raise breast-cancer awareness among young people. The rubber jewelry has become wildly popular among students, prompting bans across the country.