It's the most overlooked part of your clothing until it gets stuck. >> I don't want to break it, guys. >> We're all familiar with the jam, the snag.>> How does this happen. It's It's not budging. >> And the panic pull.>> I don't think I can get it off. >> Now, the world's largest zipper company says it's time for a makeover. You've probably seen YKK's logo hiding on your clothing.The 90-year-old Japanese company makes more than 100 million zippers a year. The way zippers are designed has remained unchanged ...