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Until the early 1960s formal hats were a wardrobe essential for grownup men and women. However, by the end of that decade we ditched all headgear as hair (and must-have haircuts) took over the style spotlight. Now driven by our sporty dress-down lives, a more diligent approach to sun protection and our ongoing need for bad hair day solutions, hats are back on top with a fashion meets function attitude. Here are the top 11 to own.