Huh? Sunglasses? YES! These are Bluetooth sunglasses and the advantages are endless? The perfect 2-in-1 combination of bone conduction and Bluetooth technology, its fantastic stereo sound, IP 67 waterproof level, comfortable ergonomic design and double Noise-cancelling microphones for handsfree calling make these glasses and headphone in one an absolute must-have. And by the way: great branding options!