What's the best way to promote a line of workout headphones? Well, if you're Urbanears, offering a "Limited Sweat Edition" that carries the perspiration of real human "movement makers" is how you go about it. The audio company teamed up with seven folks from fashion, music and sports on a group of sweat-soaked headphones that will be used to raise money for charity. Yes, it's pretty gross, but Urbanears is playing up the Hellas wireless headphones removable headband and earpads to remind you that said funk can be removed. And yes, you can buy a fresh pair if you prefer.