Clearly, these headphones are super lightweight. Though I had to do some work to find the right fit, UA provides three different sizes of tips and three sizes of ear wings to assist with the process.  I have been utilizing these both while running and at the gym and they are pretty dang comfortable as far as headphones go. They also stay in the ear pretty well and even shaking my head violently from side to side, there was minimal movement and no discomfort (aside from self-imposed nausea). I also think UA made a bit of a modification from their corded wireless headphones to these, as I don’t feel that they stick out of the ears as far. I didn’t have an issue with that regardless, but it’s still nice to have a more streamlined look.