Etsy seller SurvivorGeek makes paracord belts and straps like this one. One minute, it's a stylish way to hold up your pants, but if you pull the tab and unravel it, it turns into
550 80 feet of paracord for "survival situations" (so long as those situations don't demand that you be wearing pants, I suppose). Available in Black, Coyote Tan and Olive Drab.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.