Excellent Noise ReductionNoise reduction level NRR40,Designed with reusable high fidelity earplugs reduce damaging decibel levels to protect your ears in noisy areas without hurting sound quality. The earplugs are equipped with soft nano-silica gel and 10 replacement memory foam earplugs. Nano silicone earplugs and sponge earplugs can be switched freely.Reusable & WashableOur noise cancelling ear plugs are made of high-quality silicone materials, which can be cleaned with confidence when soiled, will not be damaged, and will be reused for many years.Super comfortableStill worrying about uncomfortable headphones? The super soft silicone material ensures that our noise canceling ear plugs are very comfortable to wear, and the ergonomic design structure makes the ear plugs close to the ears when wearing them and they are not easy to falleven as you side sleep.Convenient & PortableOur noise canceling ear plugs are very simple and compact, you can take it with you anytime. Contains an earplug box, providing a secure place to store the earplugs when they are not in use.This noise cancelling ear plugs can help you sleep more sweetly at night, and be able to settle down and concentrate on work and study.Friendly reminder Please grasp the earplug first, then pull it down very slowly and gently to break the seal of the ear canal, and then pull out the plug. Do not pull the earplug out directly. Earplugs for sleeping only block unwanted noise and protect your comfort sound, not reduce all sound to 0 dB.