D’Addario Planet Waves Pacato Earplugs are reusable, universal sized audio filters designed specifically for musicians and music enthusiasts. While other hearing protection 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. Pacato provides a noise reduction rating of 19dB and natural sound at safe listening levels, while its universal size fits all ears comfortably. Supplied with pocket-sized carrying pouch.