Original Burton Technologies Acoustibuds Earphone/Bluetooth Earbuds Covers, ABH-WHITE - 3Pairs White ACOUSTIBUDS® are engineered to improve your listening pleasure. Flexible Fins and a Twin Cone Core feature improve sound isolation and minimize unwanted sound impedance inside your ear. The flexible fins create multiple reflective sound barriers for superior sound isolation while they hold the earphone securely in position. This gives a big boost in bass and conserves sound energy so your MP3 can be played at lower volumes while blocking outside noise. The twin cone core gradually channels the sound wave into the ear. The first cone guides the sound wave from the relatively large speaker to a transition point inside the ear. The second cone is shaped like a miniature megaphone to both amplify and gradually transition the sound wave into the ear while directing it down the ear canal. By eliminating abrupt changes in area and direction along the path of the sound wave, improved high fidelity is achieved with enriched middle and upper range frequencies. Original Burton Technologies Acoustibuds Earphone/Bluetooth Earbuds Covers, ABH-WHITE - 3Pairs White features Choose your own size from 3 pairs of adapaters included Matches the contours of your ear Big bass Superior Sound Isolation Volume Boost Fins Flex and conform to ear Twin cone channels sound waves unimpeded inside ear canal High fidelity Enrichment Earphones stay in the ear better even with extreme activity Even if sweat is present the spaced fins help prevent your earphones from slipping out Also works with some bluetooth headsets Color: White Included in Package: 3 pairs with different sizes to fit your comfort Original Burton Technologies Acoustibuds Earphone/Bluetooth Earbuds Covers, ABH-WHITE - 3Pairs White