I have the S1 and the S2, The S1 is a much higher quality product. I love the material of the S2 but it’s made so cheaply that three weeks after using it one of my ear loops ripped off and then a week after that the nose piece came out. I only use this for lifting weights in the gym. I don’t even use it for high physical activity. I would suggest buying the S1 over the S2 anyday. I reviewed this product before but doesnt look like they published my review.
