Full Tweed Ahead.(clothing)(Buyers guide)

Byline: Photographed by Arthur Elgort.

Crisp as an autumn afternoon, woolen day dresses, skirt suits, and coats in heathered hues and chic checks weave their way through the countryside.

CAPTION(S):

GOING ON LINE Isabeli Fontana, wearing a smart, structured silhouette, leads her son Zion and her brother Herick Fontana past a rustic farmhouse. Dior dot-check dress, $2,835; Dior, NYC. Dolce & Gabbana brogues throughout. On Herick: Marc Jacobs jacket and pants. Details, see In This Issue.

MANE ATTRACTION Karl Lagerfeld's latest reinvention of the classic tweed suit showcases the season's new longer length. Chanel skirt suit; (800) 550-0005.

FAIR AND SQUARE Graphic windowpane check echoes the casements alongside a weathered barn. Tommy Hilfiger wool trench and skirt. Trench at Tommy Hilfiger stores. Louise Green hat. Details, see In This Issue.

CHECKERED PAST Tartan originated in Scotland, where each pattern represented a geographical area until clans began adopting them to designate their heritage. Ralph Lauren Mlange cashmere Woodland plaid jacket ($2,998) and skirt ($1,398); Ralph Lauren boutiques. On Zion: Bu and the Duck shirt.