D'Addario Pacato hearing protection is a reusable, universal sized audio filter designed specifically for musicians and music enthusiasts. While traditional earplugs can sound muffled and un-natural, the Pacato filters provide full frequency, enjoyable audio at safe listening levels. The exclusive design offers an open air passage to the ear, minimizing occlusion effect (low frequency emphasis), while keeping the ear ventilated for unmatched comfort. Every musician needs to safeguard their hearing from the damaging effects of loud sound sources for extended periods of time. D'Addarios' complete line of hearing protection allows you to enjoy listening and playing music while minimizing any damage to your hearing.