The Aether represents the pinnacle of Giro\\\'s tenacious approach to pushing the norms and striving for more. The Aether™ MIPS is the perfect example of Giro\\\'s commitment to perpetually pushing for better. From the elegant silhouette of the Aether\\\'s industrial design to how this helmet manages impact energy, it\\\'s unlike any helmet ever created and a testament to Giro\\\'s dedication to leading head protection. Three years in the making, the Aether MIPS combines airy, open design with a revolution in rotational energy management to advance head protection for cyclists. Key Features Inside the Aether, a dual-density EPS foam liner helps to manage a wide range of impact energies, while also boasting deep internal channelling to provide cooling airflow. . Proprietary MIPS Spherical technology is embedded between the layers of EPS foam - instead of against the rider\\\'s head - giving riders the benefits of MIPS without any obstruction to comfort or cooling power. Outside, a sleek 6-piece shell forms a stunning silhouette around the massive vents, which get added structural reinforcement via a shatter-proof \\\"halo\\\" that runs throughout the helmet. The final touch is Giro\\\'s Roc Loc® Air fit system, featuring three-dimensional fit tuning, that allows easy adjustment in seconds for the ultimate in comfort. About the Giro Giro was Founded in 1985 by Jim Gentes. Establishing a brand with a focus on design solutions, that enhance experience & performance. Creating innovative products that have a set a precedent for others to follow. \\\"I want to create products that make a difference to people, products that cause people to be really happy that Giro exists. \\\"Design of great products that are successful in the market and change the face of the industry is the ultimate reason this company exists.\\\" Jim Gentes- Giro founder. Giro Helmet Sizing XS S M L XL Head Circumference (CM) 47-51cm 51-55cm 55-59cm 59-63cm 63-65cm Helmets Buying Guide