It's 7 p.m. and dumping snow, which bodes well for tomorrow but not your date tonight. The options look bleak: Throw an old puffy coat over your black cocktail dress or risk hypothermia with a soggy sweater. Enter Erin Isakov, a Brown University–educated fashion designer who started Erin Snow—with its unique take on winter apparel—three years ago. Wrap that January party dress in this fall's Morgen Coat, a calf-length, 600-fill-down jacket with two-way zipper and a water-resistant, silky shell. It feels as soft and cozy as a sleeping bag but won't look out of place in Crested Butte or on 5th Avenue.

Erin Snow Morgen Coat $898 erinsnow.com