EOKOK ear plugs sound blocking sleeping only block unwanted noise,protect you in comfort voice ,not cancel all voice to 0 dB. If you find our items doesn't work,may it's too small for you .you may fell it doesn't block sound as described,at this time you can ask a full refund,thank you. Noise Reduction ear plugs: Our ear plugs are made of environmentally friendly and non-toxic silicone material, which can reduce the noise to 20dB.Earplugs are made of ultra soft, advanced silicone material and have a very comfortable shape that can be adjusted to fit your ears, even if worn for a long time. They protect your hearing during concerts, festivals, live events or while riding a motorcycle. Furthermore, they are extremely suitable for people who are easily triggered by noise (noise sensitivity, musicians, parents and more. REUSABLE & WASHABLE 100%, earplugs for sleeping are made of reusable and easy to clean super soft silicone. Reusable earplugs also save you a lot of money in the long run because you don't need disposable earplugs. Co-Friendly Packaging,there is 1 set of noise canceling earplugs,and 1 handy carry case t is very small and flexible, and you can carry it everywhere conveniently.