TWISTLOCK TECHNOLOGYyurbuds TwistLock into place for a secure fit that never falls out, even under the most intense workout conditions.SWEAT + WATER RESISTANCEDeveloped for training in any conditions.AMBIENT NOISE AWARENESSDesigned to allow more ambient noise than most other earphones at the same volume levels.EXCEPTIONAL SOUND QUALITYClinically proven acoustics for deeper, richer sound.FLEXSOFTErgonomically designed to avoid nerve rich areas of the ear. Made with flexible silicone, yurbuds are ultra soft and comfortable for hours on end.PERFORMANCE ENHANCINGDeliver consistent music, which is clinically proven to inspire longer, harder workouts.