The headphones are a perfect fit for any ear size and never fall off. My previous headphones fell out of my ears a lot. I used these at the gym, on the train and outside exercising. Never even once have I had an issue with them. Perfect sound quality, never disconnects, battery life is amazing. On top of this they are also ipx5 waterproof. Have not been damaged by sweat or rain. If you are looking for wireless earphones, don't think twice before purchasing these. Highly recommended to everyone and anyone!