Bungee cord jewelry.
Designer Jaclyn Mayer creates artful jewelry collections with bungee cord (the same type used for bungee jumping or for securing luggage) and accents each piece with gold and silver-colored metal hardware. The designs are awesome and really intricate; the necklace and cuff below are from Orly Genger by Jaclyn Mayer. Proenza Schouler featured bungee jewelry in their Resort collection a couple of years ago – naturally, Resort collections are always my favorite.;)
Seriously, what a cool idea!