TPU coated wire is the aluminium wire outer coated with TPU. With protecting TPU, the inner wire become oxygen reisistant and not easy to break. Moreover, the coated wire has better hand feel. So TPU coated wire is more convenient when using. 
TPU coated wire is good for shaping and banding. It is widely used for hat, DIY, doll toy, horticulture, etc.

TPU coated wire