While it’s tricky to find a pair that doesn’t bag at the knees and sag at the crotch, so many brands—including Commando, Spanx and Totême—have nailed it with well-fitting styles. It’s all about getting the right thickness, too. Unlike opaque tights, you don’t want them to be sheer, as this is what can make them look cheap and scruffy. Instead, thicker (more luxe) materials with details such as stirrups, split hems and a second-skin fit are what to look for.