This week MR PORTER has, for the first time, edited a hip list of the key styles for the forthcoming season. These are the 12 items, shapes and colours that represent the best of the spring/summer collections, and which will define the way stylish men dress between now and next fall. These styles range from the practicality of a backpack to the elegance of Gucci's horsebit loafers. Many of these trends can easily be absorbed into a man's wardrobe - Henley shirts and round sunglasses come to mind - while others, such as floral-print shirts and tailored shorts, may call for a little more thought. Here we list the trends, and offer some thoughts on the subject of how to wear them.