Nike’s Air Tech Challenge II has enjoyed a resurgence in recent years, culminating with a number of premium takes on the tennis classic — including a new laser-cut NikeLab treatment. But that black colorway isn’t the only one on the way; NikeLab is also dropping an off-white “Birch” version of the silhouette. Like the black pair, the kicks pair a stark white sole unit with a monochromatic upper, employing a combination of canvas and suede alongside laser-perforated leather paneling. –HB