When working in a noisy environment, ear plugs are useful because they seal the ear canal, thus reducing the level of sound. It is imperative to note that earplugs do not just offer the benefit of being more portable than earmuffs. In addition, they are also often more comfortable to wear for a longer period of time. Earplugs can be used underneath hard hats, faceshields, and eyewear. If they are paired with earmuffs, the noise reduction is often increased even further.