Trending: From the Top

Photography by Jason Kim

Sweaters aren't the only thing we break out at the first sign of fall. Beyond their practicality, the proper hat can instantly adjust the mood of your outfit. Take the beret, as favored by Giorgio Armani, Donatella Versace, and brothers Dean and Dan Caten at Dsquared2, which lent their recent collections varying degrees of military staunchness. So make like revolutionary Che Guevara and opt for this season's go-to chapeau.

From left: beret by Louis Vuitton, $630; beret by Giorgio Armani, $425; beret by American Apparel, $20; turtlenecks by Prada, $595; button-down shirts by Bottega Veneta, $450-$510