THE ULTIMATE EARPHONE UPGRADE - Congratulations, you have stumbled upon the best accessory to upgrade your earphone experience! Comply premium memory foam earphone tips are designed specfically to enhance your comfort, noise isolation, sound quality and earbud security in order to provide you with the greatest possible listening experience. Unlike silicone tips that slide out of your ear and require constand readjustment, our body heat activated memory foam earphone tips feature a stay-in-ear grip designed to hold on and not let go until you are ready to take them out. Worried about debris and moisture entering your earphones? Our intergraded SweatGuard filter protects your device from unwanted materials entering the soundport, ensuring your buds remain protected and your sound quality remains uncompromised. Our Patented SmartCore flexible core technology adapts to the earphone's sound port nozzle for a secure fit, ensuring perfect compatibility with most earphone brands and models. To confirm your earphone is compatible with SmartCore, you can visit our website and utilize our "Find Your Fit" interactive feature. If our advanced features and technology aren't enough, we proudly manufacture our products in house at our facility in Oakdale, Minnesota, right here in the United States.