The sport earphone that changed the game for top endurance athletes and fitness enthusiasts by allowing them to enjoy music while training. Combining the patented Twist-Lock Technology and a personalized fit, these sport earphones are guaranteed to never fall out, even during the most rigorous physical activity. The Yurbuds Enhancers are manufactured from medical grade silicon giving the Ironman Inspire an ultra-soft and comfortable fit, while allowing for sufficient ambient noise, so you always stay aware of your surroundings. The rugged, water-resistant and sweat proof design make these sport earphones ready for extremely active use and a must for any athlete.