Earplugs - Corded, Uncorded, Banded, and Metal Detectable. What are the best earplugs for your hearing protection needs? Disposable, Reusable, Corded, or Uncorded. Many people prefer Corded Earplugs to reduce their risk of dropping or losing a plug while not in the ear. Uncorded Earplugs are recommended around machinery or other tasks where a cord may cause interference or safety hazards. Disposable Earplugs are most common in factories or different settings where oils, dirt, and other particles can accumulate on the earplug. Reusable earplugs are generally best suited for cleaner environments with less risk of frequent contaminants. Metal Detectable Earplugs are commonly used in food manufacturing to prevent misplaced earplugs from ending up in the food. Lastly, Banded Earplugs are another option. These can be a convenient solution when hearing protection needs to be donned and continuously removed. You also need to consider the NRR or noise reduction rating required for your work environment.