Students at a high school in Montana are fighting back against what they consider a sexist dress code. 

The movement kicked-off after a female student was reprimanded for not wearing a bra to school. 

Kaitlyn Juvik, a senior at Helena High School, was called into her school's office last month after another student complained about Juvik's attire, MTN News reported.

Here's what Juvik was wearing at the time. 

The school's principal Steve Thennis said the issue was not Juvik's failure to wear a bra, but rather, it was the fact that her decision made another student feel uncomfortable. As a result, administrators asked Juvik to change or put a bra on.

“The fact that I was told it makes people uncomfortable offended me because it’s my body,” Juvik told MTN News. “It is my natural body and I’m not sure why that is uncomfortable to somebody.”

According to MTN News, the school's dress code does not give any specific guidelines regarding what students wear underneath their clothes. The lack of an explicit and clear rule prompted Juvik and other students to protest by going without a bra for a day.

Subsequently, Juvik created a Facebook page called "No Bra No Problem" where dozens of students joined to stand in solidarity with Juvik.

According to the page's About section, No Bra No Problem is "the movement for gender equality, women's rights, & being comfortable," and a community that is "against discrimination in schools, we focus on the right for girls to go braless."

Supporters of the movement have been using the Facebook group to voice their frustrations over how dress codes restrict women's clothing options and encourage body shaming.  

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ATTN: reached out to Juvik but did not receive a comment in time for publication.