Unless you looked closely at a pair of linen broderie anglaise dresses at Behnaz Sarafpour's Spring presentation, you probably didn't notice that the buttons were actually made of cherry pits. Yes, cherry pits. "They were cleaned really well," the designer assured us.

Sarafpour has been making efforts to incorporate sustainable practices into her collection for several seasons, but something about the terrifically fresh and pretty sportswear she showed today seemed to fully crystallize the idea and her market niche. "We're not an organic line," she said. "I want it to be luxurious, but have those elements." That means a swingy organic cotton gauze tank dress can be inset with a conventionally produced lace bodice, and no one cries foul. Sarafpour worked a nature theme in a layered palm print cut into a pajamalike jumpsuit and a tiered halter dress. But most looks had the breezy, uptown elegance upon which she made her name: For spring days, there was a crisp trench belted over wide, dark jeans; for summer nights, a slouchy white silk tank, luxed up with silver stripes and tucked into a flaring white taffeta skirt. A pair of denim overalls could have seemed out of place, even with their sharply creased legs, but then again, perhaps not when green is the word.