I buy these a month ago to replace Aquapac 100 % waterproof headphone which would not stay in my ear no matter what I try -lrb- different earpiece , push in further , wear a swim cap , not wear a swim cap , etc. -rrb- . the earpiece on these penetrate further into my ear and remain in place until tug out , solve my problem . I only use they for swim because they be slightly uncomfortable and the sound quality be only fair , but swimming be a noisy business and sound quality be secondary to be able to hear anything at all . I remove the part that go over the ear as they be a nuisance to I . I have be very pleased with these , and have read here that they sometimes prematurely self-destruct I order a backup pair today .