Business in the front, party in the back. “I feel like there’s a return to deliberate undressing,” said one expert.

Men wore cheekily low-rise jeans. Diesel has become a must-see of fashion week, in part due to its textile innovations. A silicone fisherman-pattern V-neck featured realistic chest hair detailing.

Diesel's latest collection, unveiled at Milan Fashion Week, embraced a dystopian theme with models sporting ghostly eyes and spray-painted smiles. The collection featured bold silhouettes ...