Professional noise reduction earplugs, sleep comfortable, sleep peacefully, special-shaped earplugs can adapt to each person's different ear canal, to achieve a good fit, so that your sense of use is not affected. For better sound insulation, first clean the ear canal with a cotton swab or napkin, then remove the shaped earplug, divide it into two parts, squeeze the earplug into a strip, press the earplug with your index finger, and then insert it into the ear canal to fill it. The shaping is complete, so you can start blocking out the noise. In addition, the ear cannot be used for sleeping, sound insulation effect is good, designed for comfort, to a large number of 3 d scanning geometry, and according to these data made a earplugs, the size of a small pea flexible and comfortable, suitable for upper ear contour shape suits in the library, sleep and some noisy scenario use including packing: 2 acoustic earplugs