-Specialized Center Line Guard Stopper prevents the diaphragm of the earphones from falling within the ear canal and keeps your eartips centered for maximum sound quality and comfort. -Studies show you can use the various sizes based on your activity and the amount of hold and isolation you would like. For example while resting a great hold is not needed like as in gym activities. -Specialized material conforms easily to the shape of your ear canal which makes for a comfortable fit that reduces ear fatigue and stays in place during activities. 3.Apply pressure and with a circular motion, twist with one hand clockwise and with the other the opposite direction, until the ear tip has fully covered the Driver of the Earphone. -Products are Brand New, Ready to Use and Sterilized using UV Ligh.
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