Look to Stella McCartney for stylish wardrobe staples with an elegant and modern riff like this beige cotton Caban trench coat. It's shaped with oversized storm flaps that fall over the bodice and upper back alongside a smocked elasticated waistband and features buckle-fastening tabs that cinch the cuffs. Leave it open over a striped shirtdress to tease out the nonchalant appeal.