GIRO AETHER SPHERICAL MT Phe Aether Spherical combines airy, open design with a revolution in rotational energy management to advance head protection for cyclists. Inside the Aether, a dual density EPS foam liner helps to manage a wide range of impact energies, while also boasting deep internal channeling to provide cooling airflow. Our proprietary Spherical Technology is integrated between the layers of EPS foaminstead of against the riders headgiving riders the benefits of