Pink hats with cat ears have turned into something of an unofficial uniform for Saturday's Women's March in Washington, D.C. and people are desperately trying to buy yarn to make the hats in time.

A pink knit hat with cat ears is expected to be the overwhelming accessory at the Women's March on Washington Saturday An estimated 200,000 women from all across America are preparing to descend ...

as seen in the 2017 Women’s March when protestors wore pink hats. Democratic women also wore white to past State of the Union ...