inputs.text: good workout armband coby mp3 player - bought armband case husbands coby brand mp3 player coby mp3 player unfortunately not come proprietary cases owners must make aftermarket options one nice job couple reviewers commented poked holes bottom accommodate lack opening headset jack someone else commented put mp3 player upside design either power switches headphone jacks fortunately figured turn armband upside velcro flap holds mp3 player inside plenty strong enough wear armband way work perfectlyone note not buy armband mp3 player another reviewer commented bought wife way big arms comment 54\\ 125 lbs armband fits arm perfectly would teeny tiny stick arms not fit lady normal size arms even muscular ones working lot give armband try great job holding device steady not sliding arm wish wed bought two reason didnt rate purchase 5 stars designers didnt figure put headphone jack openings begin