The YKK that you see on zippers stands for Yoshida Kogyo Kabushiki Kaisha which is the name of the founder of the zipper manufacturing company in Japan - #zap this if you like to see more. #Fact
Since I’ve been a kid accidentally zipping thing that shouldn’t be zipped up. Just before I saw stars and the pain registered YKK was the last thing I remember seeing. It’s fitting one guy should corner that market. He is the reason I wear grey sweats exclusively