Looks like some kind of Kinesio Tape.

http://www.amazon.com/Kinesio-Tex-Gold-Tape-Resistant/dp/B001VNE7TK/ref=sr_1_1?ie=UTF8&qid=1429584340&sr=8-1&keywords=kinesio-tape

"It creates a lifting effect which improves circulation and relieves pain. The tension on the tape has the ability to relax or stimulate muscles."