The classic trainer has long been a firm fixture in the off-duty wardrobe, lending sporty ease to jeans, jumpsuits and easy dresses. However, recent seasons have seen it become a regular in the dressier sphere, too. A sleek iteration with minimal detailing can be paired with tailored trousers and a tux jacket for a contemporary twist on cocktail dressing. Look for styles in leather, suede or canvas, for maximum versatility.