The Planet Waves Pacato hearing protection is a reusable, universal sized audio filter designed specifically for musicians and music enthusiasts. While other hearing protection can sound muffled and unnatural, 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. Planet Waves, part of the D'Addario family of brands, is known for innovative, problem-solving, quality musical accessories. Planet Waves offers a complete line of award-winning accessories including cables, picks, tuners, capos, straps, humidifiers, maintenance tools and more.