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Giro Aether MIPS Adult Road Cycling Helmet – Medium 55-59 cm Matte Black 2021 – Inside the Aether a dual-density EPS foam liner helps manage a wide range of impact energies while also boasting deep internal channeling to provide cooling airflow. Our proprietary MIPS Spherical technology is integrated between the layers of EPS foam-instead of against the rider’s head-giving riders the benefits of MIPS without obstruction to comfort or cooling power. The stunning silhouette is formed by a sleek six-piece shell that surrounds a series of massive vents with added structural reinforcement via a shatter-resistant AURA reinforcing arch. The final touch is our Roc Loc 5+ Air fit system featuring 3-way fit tuning that allows for easy adjustment in seconds.