PERFECT NOISE REDUCTION - noise cancelling ear plugs has a noise reduction rating (SNR) of 27 decibels to protect your ears in noisy environment,They can reduce most of the noise, Filter the sound and optimize itensures a clear sound experience in sleeping or noisy place. OPTIMAL COMFORT- Our sleep earplugs are reusable and durable hearing protection devices made of soft silicone.4 different sizes allow you to always find the most suitable earplugThe soft earplugs keeps you comfortable whether youre listening music or sleeping for long periodMake it a must-have to protect your hearing. MULTI-PURPOSE - HOYIO ear plugs are versatile ear plugs that provide protection from noise pollution in a variety of situations. They are perfect for sleeping, sleeping, working, concerts, traveling, studying and other noisy environments. In addition, they are perfect for those who are easily triggered by noise (people who are sensitive to noise, musicians, parents, etc.). EASY TO USE - Pinch the earplug and insert it into the ear canal Turn it slightly to find the most comfortable position. They come in 4 sizes (XS - L), if your ears hurt it's best to choose the smaller size, if the earbuds don't reduce the sound sufficiently or fall out, it's best to try the larger size.