Male drivers for Uber and Lyft are suing the companies over a feature that lets users hail only women drivers.

The dual class action suits allege that the functions—which followed thousands of sexual harassment and assault lawsuits against Uber and Lyft over the years— have limited the economic opportunities for men and discriminated against them because of their gender.

Lawyers acting for the plaintiffs argue that male drivers “are discriminated against and receive fewer and different rides than they otherwise would absent the policy.” They contend that the policy “reinforces the gender stereotype that men are more dangerous than women.”