Can Peter Do Restore Helmut Lang to Its Former Glory?

Peter Do wants to dress New York.

And when he unveils his debut collection as creative director of Helmut Lang Friday afternoon, New York will see — and judge — what the designer plans to offer: straightforward tops, dresses and jeans that combine the legendary label’s industrial, androgynous sensibility with Do’s own subtle tailoring.

“I just feel like more than ever we need non-fussy clothing,” Do said in an interview ahead of the…