Warm, comfortable, flattering, versatile: Tights have become the go-to article in many a New Yorker’s fall wardrobe. But not all opaque stockings are created equal, and discerning among the dizzying array of hosiery options raises quite a few questions. Does price predict durability? Does heavier equal warmer? Why do some suddenly go all baggy? To find definitive answers, we subjected nearly a dozen makes, including (from top) pairs by Commando, Fogal, Target, Topshop, Wolford, and Urban Outfitters, to extreme fabric testing at F.I.T. Click here for the results.