First of all, start with picking a good pair of jeans. Because nobody ever felt bad in denim trousers. In this case, throwing an oversized army jacket always works apparently. And just be light with accessorizing: statement shoes, stunner shades, and an assorti bag will work just fine. Now you can keep your casual Parisian style on lock any day.
Photo credit: Jonathan Zegbe for Enfnts Terribles