Here's the thing about raw denim: after months and months of wear key areas like the crotch and back pockets can blow out, and your hard-earned fades and whiskers can seem like a lost cause.

Thankfully, Andrew Chen of Self Edge New York can help. The shop repairs jeans through a process called "darning." It's way more durable than a patch and essentially creates new fabric and weaves it into the old denim, creating a more natural look that gets better with age.

You can't do this just anywhere — Self Edge is one of the few places equipped with a 1950s Singer Darning Machine.

Check out how they can make your favorite pair of jeans last longer as Andrew walks us through darning process.