Howard Leight by Honeywell MAX Disposable Foam Earplugs offer the best hearing protection in the workplace of any single-use earplugs (33 NRR). The pre-shaped, contoured foam is designed to fit almost any ear canal for comfortable all-day wear on the job. A closed-cell outer layer prevents dirt from building up. These earplugs are the most used PE foam earplugs in the world and are suitable for use in almost any industry. 200 pairs of earplugs per pack. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.