One of our favourite knitwear trends over the past couple of years has been the resurgence of the shawl collar cardigan, which of course we all remember seeing on stylish gents from decades past. Summer's here and we're glad to see the piece keeps rolling on. The warm-weather version is light weight, light in colour, maybe linen or a loose weave. Wear out on cool evenings or poolside after a swim. Shown: J. Crew (left), Hugo Boss (right).