Watching ABC’s Shark Tank can be both edifying (“I need that!”) and frustrating (“She stole my idea!”). Every episode presents some of the strangest inventions and concepts we’ve ever seen, from a bluetooth “headset” device that would have been surgically implanted in your skull, to anti-flatulence underwear (See: “Why didn’t I think of that?!”). If you’ve never watched the show, here’s how it works: Entrepreneurs present their concepts to a board of “sharks;” i.e., potential investors, hoping to gain the  money they need to make their dreams a reality. With ideas spreading across industries from power generation to toys to food to pet care, it’s a given that the apparel industry wouldn’t be spared. The show has actually launched several retail concepts, as well as a few fashion concepts to boot. Here we’ve gathered some of our favorite style pieces that swam with the sharks…and lived to tell the tale. OK, who hasn’t been in this situation? You head out the door on a cool day, only to find things warm up along the way. You take off your sweatshirt, tie it around your waist or leave it on the ground…then hours later when things cool down a...