Super nice pair of glacier shades. Im a grad student and the course Im taking is online. I use the small like on other ones and they feel like it slid out to the opening of my ear canal. I have been using these three at a time. I would recommend this shoe to anyone. I can easily adjust it at the turn of the dial on my desktop when I am playing with friends. Its basically the same battery life as the original. Por el costo que tiene esperaba mejor calidad. You’ll need to work em in a bit but they’re exactly as advertised and that’s what I wanted! All in all, clearly the best of all front riding systems available.