This isn't a top ten or this would be the one thing I would take if I could only take one thread. Instead, I always like to keep things in my bag that have many uses. I like as many options as possible without taking everything and the kitchen sink with me - ounces make pounds and such. Now a knife is insanely useful and and absolute (in my mind) but it's "uses" are mostly restricted to cutting, so single use in my mind (maybe you could add as a fero striker if it's high carbon). I'm thinking a good neckerchief or bandana has 'many' uses. Head cover. Dust mask. Water filter. Tourniquet. Flag. TP.... In a pinch, ew. Lashing or securing items. Fire tinder or char cloth. Bandage for cuts. Etc. And I know there are many other uses - I have seen large lists before but those were just a handful I could think of fast. What are some of your best Multi-Use items and why?