Fashion is a fickle thing. Seasons change, trends flux and what’s ‘in’ one day is ‘out’ the next. Style, however, is a different matter. Despite the cyclical trends in fashion, certain men’s clothing essentials – a bomber jacket or dark indigo jeans – will always keep you looking good, no matter the time or year. Here’s 21 key items that’ll keep your wardrobe looking sharp all year-round… and a bonus extra for autumn