Yet more wearable blueooth technology. Flame 5 (F5) is:

a jacket that connects to your personal mobile via Bluetooth and enables communication via heat. If a person sends an SMS (TEXT) to a remote person wearing Flame 5, the clothing heats up depending on the personal message. Flame 5 works with standard Bluetooth mobile phones.

The work was conceived and developed at the Ambiente Group, Fraunhofer IPSI.