This pair of soft foam earplugs are ANSI certified for the worksite, and come with a reusable 1 1/4" x 1 1/4" plastic case with short beaded chain. Simply roll them between your fingers and insert them in your ears, and they'll expand to fit any ear and are one size fits all. They will block out harmful sounds and they offer a 32 decibel protection. Packaged in a reusable plastic key chain box.