Material: Polyurethane FoamNoise Reduction Rating: 29dBDesigned Of Soft Foam That Expands To Fit Virtually Any Size Ear CanalComfortable To Wear For Extended PeriodsCorded Allows You To Remove Earplugs And Let Them Hang Around Your Neck Until You Need To Reinsert ThemPackaged In A Plastic Sealed Pack To Ensure Plugs Were Never Used