Also, you apply just like a sticker. Just make sure there's no dirt or anything on the spot where you are applying them. For that, I used a 50/50 mix of rubbing alcohol and water in a spray bottle on a microfiber cloth.
It's kind of some weird rubbery plastic material. It bends and stretches a little bit, which makes it easy to apply on bends and turns and stuff. I'm a fan of the look. I picked them up at AutoZone...