Sen. Bernie Sanders (I-Vt.) is tabbed as the opening-night speaker for the 3-day Women's Convention later this month in Detroit.

Tamika Mallory - co-founder of Women's March, the organizers of the convention - touted Sanders as powerful "on progressive issues, women’s issues, mobilizing millennials," and that "we believe as women ... that we ought to have more than just women at the Women's Convention."

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However, not everyone is thrilled with the choice.

A number of women criticized Women's March on social media for selecting a man as the opening-night speaker for the first national Women's Convention in 40 years.

A few examples:

Mallory said Sanders brings experience as a long-time Senator who continues to work to bring progressive change to government.

"People want to hear from the leadership from within our government who can give us some insight about what's happening … so we can know what we need to do to be able organize," Mallory said.

Other prominent speakers at the conference include U.S. Rep. Maxine Waters, D. Calif., as well as actress Amber Tamlyn, CNN political commentator Sally Kohn, Michigan Democratic gubernatorial candidate Gretchen Whitmer and actress/producer Piper Perabo.

The Women's Convention takes place Oct. 27-29 at Cobo Center in downtown Detroit.

You can find more details about the convention here. Conference tickets are available online here. The ticket cost for all three days of the conference is $295 for adults and $125 for students. Single-day tickets are available for $125.

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