If you're after an off-duty but also stylish look, wear a charcoal coat and black leather shorts.
Black Leather Shorts with Charcoal Coat Outfits For Women
A charcoal coat and black leather shorts will add serious style to your current casual repertoire. Introduce black suede knee high boots to the mix et voila, the look is complete.
A charcoal coat and black leather shorts make for the perfect base for an endless number of chic combinations. If not sure about the footwear, stick to a pair of grey suede over the knee boots.