This week in New York, Sienna Miller wore the perfect outfit for a Sunday of doing very little. Her outfit is the COS girl's answer to wearing a hoodie and joggers, as she wore cosy but elegant, basics. Sienna wore a pair of slouchy grey high-waisted trousers (they look just as comfortable as joggers but aren't as sloppy) with a black cropped knit and a sweeping camel coat. Her accessories — a pair of white Stan Smith trainers and a Saint Laurent oversize handbag — made her outfit look expensive and polished. Keep scrolling to see Sienna Miller's perfect weekend outfit, and then shop the key pieces below.