Paul Smith treads the line between formal and casual with these trousers. Designed to be worn as a suit with the matching jacket , they have been tailored from a grey wool-blend fabric that's smart and sharp. But the cut is loose through the leg and they're elasticated at the waist, bringing a new comfort to the otherwise classic design. Shown here with a Balenciaga shirt , Burberry London tie and Marséll shoes .

• Grey wool-blend suit trousers
• Elasticated waistband with adjustable grosgrain band, four pockets, half lined
• 96% wool, 4% elastane; lining: 100% cupro
• Dry clean