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