In the photo, it looks sort of like a metal-wrapped cord... That'd be neat to see used in clothing.
There are actually yarns that have stainless steel in them, and they're surprisingly drapey and soft by the looks of it. I think only the brand Habu has made yarn like that, though.
I remember seeing a blog from a woman who owned her own alpacas and spun her own yarn, as well. If I can recall the name of it, I'll post it here. It was pretty informative.