A:Answer Hi Joe- The major difference between the Jabra Elite 85t and the Jabra Elite Active 75t are the IP Ratings. The Jabra Elite 85t is equipped with IP55-Rated protection from dust and water. However, Jabra Elite 85t also comes with a 2-year warranty against dust and water damage, so you can wear them with confidence. The Jabra Elite Active 75t is equipped with IP57-Rated protection making them fully waterproof and sweatproof, so there’s nothing holding you back from running through the storm or sweating out your new personal best in the gym. For more information on the Jabra Elite 85t, please visit the following page: https://bit.ly/2QY64K1. For more information on the Jabra Elite Active 75t, please visit the following page: https://bit.ly/2FwD3zG. Thank you!