Once upon the early aughts (and OK, the ’80s), we thought ripped-butt jeans were the most risqué denim trend out there, but we stand extremely corrected. Levi’s has teamed up with Parisian design ...

It's 90 degrees outside. The sun is beating down on your neck, and your clothes are clinging to your skin. Sweat drips down your back, and all of a sudden, your jeans are almost unbearable to wear any ...

Then, in the spring, came a pair of jeans that split in two, with a zipper that runs from front to back. When French fashion brand Vetements collaborated with Levis on the high-end denims – they cost ...

Next time you zip up, or zip down, check out your zipper. There’s a good chance it’ll say YKK. But, what is YKK? I head to South Gate, California, to find out. At Koos Manufacturing in South Gate, ...