I bought these for my partner to use when he goes for runs. While he hasn’t actually managed to go for a run with them yet, he’s tested them around the house and hasn’t had any issues with them falling out (which is great because he was hesitant to buy any in ear earphones because he says the never fit his ears!). He was also super impressed with the function that allows you to essentially cancel out the noise cancelling aspect of the earphones. The microphone doesn’t seem to work too great when exposed to wind, but is to be expected with wireless earphones. Great value for money.