Trekz Air is water and sweat resistant
The Trekz Air headphones are coated with a special nanotechnology that makes it so they easily repel sweat and moisture. This is perfect for anyone who's looking to take them on a long workout, whether running, biking, or all the above is your vice. Plus, waterproofing in a set of headphones is important not only because sweat and water will reduce the audio quality by limiting the bone conductivity, but it'll also preserve the other components of the headphones and allow them to look fresh and like-new for longer. Unfortunately, there is no IP rating available for these headphones to quantify how water-resistant they are.
That being said, however, they shouldn't be left in wet environments or completely submerged in water as that would likely destroy them. They're not entirely waterproof in that sense and an excessive amount of water will likely ruin your headphones and render them irreparable.
They're a great accompaniment on outings and can withstand a light rain or mist. However, they wouldn't fare well if it was a torrential downpour.