The soul of New York City menswear is versatility. Ours is a gritty city, sweaty and grimy, on the move down long sidewalks, stuffed in subway cars, crammed shoulder to shoulder into dive bars and brunch spots and coffee shops with Wi-Fi. Ours is also a chic city, the capital of couture, where every day is an 8 million–person public fashion show. Onassis keeps a man fresh and flexible, with quality V-necks that hug the body like the proverbial second skin and durable button-downs and a range of chinos in only the most tasteful colors. A man can wander around the Soho location (there’s a second location in Rockefeller Center, not to mention outposts in San Francisco, Taipei, and Tokyo, for those on the go) for far longer than he intended, browsing the racks that hang off exposed-brick walls and examining the leather bags and perhaps even sipping a cup of coffee at the café in back. Onassis offers a collection of classics that can carry a New Yorker from an office meeting on Wednesday to a picnic at the park on Saturday.