This is perhaps one of the coolest features of wool, because it's kinda like having super hero powers or something. Wool is unable to hold a flame, -aka catch on fire like some of those other fabrics out there (cough, polypro, cough). Have you ever been around a campfire and had errant spark fly out and hit your old synthetic fleece, leaving your nice pullover with a big 'ol burn hole? Well, not going to happen with your wool on, just tell that garment ruining spark buh-hye.

~via the Ibex Buzz