In November of last year, amid the aggressive grey that is winter in New York City, Christopher Street was overrun with color. From Hudson to Bleecker, someone had swaddled the trees in different shades of crochet. Nearly 1,500 squares of lavender, mint green, cobalt, powdered pink, and egg-yolk yellow lined the sidewalks. Passerby began posing with them, Instagramming them, calling them “tree cozies.” Parents admired the eight-foot-tall sweaters with their children, asking aloud which ones were medium, which ones were large. As it turns out, the trees of Christopher Street were clothed by Holly and her aunt Polly.