New York Fashion Week: Derek Lam fall 2015

New York literati like Diane Keaton and Katharine Hepburn inspired the long billowy trousers and ’70s-tinged tweed suits in Derek Lam’s refined collection. But we were also charmed by the knits: the cool opening navy V-neck with elbow patches, ever so slightly oversized hazelnut colored crewneck or any of the polished wool turtlenecks will be super smart buys.

Trends: flared pants, long, lean silhouettes, mannish suits

Instaworthy: The knits or statement trench coats