Offers the highest independently tested NRR 33, making them suitable for most noisy environments. Provides serious protection. PlugStations are sealed to ensure that the plugs stay clean and sanitary. Earplugs drop right into the palm of your hand so you don't have to worry about plugs falling on the floor or trays collecting dust and contaminants. Workers take on e pair at a time there is no wasteful grabbing of multiple pairs or pocket fill-ups that end up getting trashed without being used. Less waste means more cost savings.