after waiting so long i went ahead and bought the arm band that is available in all those colors. suprisingly it doesnt slide around like it looks. i had it upside down on my arm while i was doing cardio at the gym. after an hour of cardio, it didnt even move. it still doesnt have the security of staying put but it still does. i do not know how long that will last but whatever. itll do until vaja comes out with the nano cases.