This collection exhaled a laid-back, high-summer feel. The core inspiration: David Hockney’s swimming pool paintings as well as Romy Schneider’s easy chic in the 1969 movie “The Swimming Pool.” Though the fabrics were as intricate as ever, with strips of napa leather and suede handwoven into borders, plus plenty of panelling and piecing, head designer Karsten Fielitz kept it all nonchalant. There were pajama-like crepe de chine palazzo pants and a matching halter top, slouchy bat wing and cocoon cuts, and silk crepe gowns with swimsuit-worthy necklines. Even Lange’s signature tweed jacket was de-formalized into a cardigan, paired with tailored shorts.