Travel earplugs, earplug, ear plug. Canister Ear Plugs With Key Ring is suit for travel, sleep, firearms, study. Canister Ear Plugs With Key Ring is suit for travel, sleep, firearms, study.Convenient soft cord Recommended for high noise situations Noise reduction rating: 25dB - 33dBComfortably fits ear canal Features smooth and dirt-resistant surface for hygiene Cord helps prevent loss.