text: Very good fit and good sound quality
  
  Way better than my previous waterproof headphones. Various earplug sizes included to find the best fit for your ears. Together with 'half moon' fitting pieces a very good and secure fit was possible. Did an open water swim for > 1 hour and they didn't come out of my ears. Overall sound quality good, but low (bass) tones could be a bit better (personal preference).