It’s back to school time across much of the world, but nowhere has the annual ritual drawn more attention than in France.

This attention comes after French officials said they will bar children in public schools across the country from wearing the “abaya,” a full-length robe used by some Muslim women to convey modesty.

The rationale for the ban, they said, was to stem a growing number of disputes in its secular schools. But critics of the new measure called it discriminatory, fueling another debate across France regarding the way Muslim women dress. Debates about immigration played a role in this, as well.

France, which prides itself on its secularism in public institutions, has since 2004 barred middle and high school students from wearing any symbols that have religious meaning, including a cross, a yarmulke or head scarf.

Since 2010, it has also been against the law to wear a face-covering veil in public. Last year, lawmakers placed a ban on hijabs and other “conspicuous religious symbols” in sports competitions. Earlier this summer, France’s top administrative court ruled against allowing body-covering “burkini” — a head-to-ankle piece of swimwear — in public pools for religious reasons, arguing it violated the principle of government neutrality toward religion.

What is the abaya? It is a flowing dress that covers both arms and legs but not the head or hands.

While the robe is popular in Arab-majority countries, it does not have a clear religious meaning. it is mostly worn by Muslim women who want to follow the Quran’s teachings regarding modesty.

Some Muslims consider the female body — with the exception of the face and hands — “awrah,” which means it should be concealed in public and not to be seen by men.