The Giro Tenaya Spherical Helmet offers a hybrid construction and advanced technical features that provide fit comfort and protection. Warmth and comfort are provided with the plush max padding comfort and Giro's In Form 2 fit system. The shell has Thermostat Control, adjustable venting for customized airflow and Spherical Technology. Powered by MIPS that reduces rotational energy during certain impacts keeping you safe while you explore the mountain or venture into the backcountry