The Plantronics Convertible Headphones with Noise Cancelling Microphone is the most comfortable pair of headphones you will ever wear! These headphones allow you to wear them any which way you want- over the hear, behind the head, over the ear. The patent pending anti-twist microphone has two options- noise cancelling capabilities ensures that the person on the other line hears you with crystal clear clarity or a voice tube microphone. No needing to repeat things again again because of background noise. The T-Pad headband design is ideal for the ultimate in comfort and perfect placement of the headphones of your head so there is no slipping.