Best quality passive noise reduction headset for students and first time pilots Designed for students, new pilots, and value-conscious experienced fliers, the Telex Echelon™ 20 full cushion aviation headset offers comfort, excellent hearing protection and value. The Echelon 20 provides an impressive 20+ dB of passive noise protection and a top-quality noise canceling electret microphone for clear, reliable communications. The Echelon 20 features a low-profile headband for even weight distribution plus patented ComfortCam™ technology, a three-click tension adjustment system for a custom fit. Special earpieces with foam ear-seals pivot two ways to conform to any wearer while detent sliders adjust the headband ?? making the Telex Echelon 20 acomfortable headset for any flight.