Defiance, celebration, warning, rallying: There are so many good reasons to unfurl a flag. Some of those hoisted above his home by artist James Esber on Williamsburg’s Grand Street entreated citizens to vote recently, although others over the years have defied the raison d’etre of flags with witty subversions intellectually worthy of the bohemian hood. But Brenda Zlamany’s double-sided masked portraits actually conform to a plague-fighting remit. Real, living human visages peep out from the functional, life-saving fabrics which themselves often deploy the signifiers and tropes of heraldry: symbols, fields, words. A portrait of fellow artist Justin Sterling peers out from a lined cloth whose tapering black strokes on a white ground recall a kaffiyeh in just the right balance of protection and resistance.  DAVID COHEN

Above Store For Rent Gallery at 179 Grand Street, Brooklyn, New York. Best viewed from the north-west corner of Bedford and Grand
There are two flags alternating week by week through April 9, with changing flags at 4pm Fridays
Mask Flag 1 features Justin Sterling (pictured) and Joel Lahey, Mask Flag 2 features Helen Oji and Adé.