“I’m going to show you how I take the coziest thing I can wear and make it look presentable to the fashion world,” says Gigi Hadid on set in a full Guest in Residence cashmere look for the latest installment of Vogue’s 7 Days, 7 Looks. The supermodel, mom, and designer/business owner breaks down how she masters comfort-first style for any occasion, be it backstage at Fashion Week or going out for a friend’s birthday party and just about everything in between.  Hadid jokingly tells us that a tie-dye knit and relaxed trousers are considered to be on the more formal side of her wardrobe. The model also admits she likes to…