Walker's NRR 27 DB 23" Nylon Braided Rubber Ear Plugs offer optimal hearing protection with a Noise Reduction Rating of 27 decibels. The blue contour design ensures a comfortable custom-like fit, while the included 23" nylon braided cord helps to keep them securely in place. These earplugs are resilient and reusable, perfect for noise reduction duties. They come with a carry case for easy transportation and prevent loss when not in use.