PARIS — Plans by a major sporting goods company in France to sell a hijab designed for runners have incited yet another debate over what Muslim women wear, exposing once again the tensions between secularism and religion in the country.

France’s longstanding attitudes toward feminism, secularism and the integration of immigrants are at the root of the many controversies, but they are also fueled by recent fears about Islamist terrorism, along with the rise of social media.

The most recent debate centers on plans by Decathlon, Europe’s largest sporting goods retailer, to sell the hijab, which covers the wearer’s head and neck. Criticism quickly came from many quarters, with one lawmaker saying that the debate laid bare “this obsession around the veil and Islam.”

What is the Decathlon controversy?

Decathlon had started selling the sports hijab in Morocco last week and planned to do so in France. The move was quickly criticized on social media, and several politicians expressed discomfort about the product being sold in France.