As denim fads come and go, it's pretty safe to say that 501s always remain in style. Since they were introduced over 140 years ago, 501s have been a staple of so many closets around the world. And even though they've been around since the dawn of modern electricity, the jeans are actually subtly tweaked over the decades to keep up with changing silhouettes and styles. The cut has once again been tweaked with the launch of the 501 CT (customized taper). The CTs are feature a relaxed fit above the knee and a tapered fit below the knee—which is a really nice combo. Vogue collaborated with Levi's to create a limited-edition version made with deadstock denim from the jean maker's Eureka, California mill. But if you weren't lucky enough to snatch a pair of those last week, there's plenty of good stuff to choose from online—from a cottontail white ($64) to a old favorite blue ($98).