Fashion cycles dictate that flares are “in” again. We’re not sure how we feel about this. What we are sure of is that you shouldn’t confuse flares and flairs.
Flares pictured from Stella McCartney
In this context, flares are jeans which became wider towards the ankle. You cannot call them flairs. That is simply wrong. Flair means (per the Macquarie Dictionary “elegance; stylishness”. There is no inflected form of flair.
Fashion choices can matter, but accuracy matters more.
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