Over 5,000 people have signed a petition criticising a secondary school in Co Carlow after it was claimed female students were told not to wear tight clothing.
Dozens of parents of students attending Presentation College Carlow expressed their anger on social media.
One parent told RTÉ News that her daughter was told not to wear leggings or tight tracksuit bottoms.
Parents said the message was given at a number of assemblies last Friday.
The petition on Change.org urges fellow students to sign the petition against "sexism against female students".
Presentation College Carlow has said the rules concerning the correct wearing of school uniforms have not changed since previous years, other than the introduction of a half-zip top for first year students.
A statement on the school's website this evening said students are regularly reminded of school rules and regulations at assembly.
It said: "The school continues to look after the pastoral care needs of all students through its excellent Pastoral Care/Student Support systems in the school.
"Any queries in relation to the above from parents of students will be dealt with in the normal way through the usual school channels."