Ear-friendly silicone material: made of soft silicone material, the moldable earplugs are lightweight and comfortable to wear even for a whole day, which are also reusable that you just need to clean them regularly and leave them dry naturally for future use^ Comfortable fit: the noise cancelling ear plugs are designed to fit ear canal without making any pressure, suitable for both adults and kids, these ear plugs cover the ear canal tight enough that will not fall out even when side sleeping^ Dual functions: the waterproof ear plugs have good noise reduction performance, muffing noise from construction site, concert, or traffic so that you can have a better environment for sleeping or studying; With good water resistance, the earplugs can also protect your ears while swimming (but note that silicone earplugs aren't recommended for outdoor swimming on a hot day)