Giro Aries Spherical - Best Ventilation & Safety
The Giro Aries Spherical sets the standard for cool-running helmets, offering unmatched airflow coupled with one of the highest independent safety ratings on the market.
- +Best-in-class ventilation system with wide-open vents and efficient internal channeling
- +Among the highest safety scores from Virginia Tech, earning a five-star rating
- +Uses innovative MIPS Spherical technology which integrates protection without a separate liner, improving comfort and airflow
- -The spherical ball-and-socket design can make adjusting the helmet forward on the brow slightly stiffer
- -Sunglass storage in the front vents may lack sufficient padding for temple comfort on very long rides
- -Premium performance is reflected in a premium price point
For riders who prioritize a cool head and maximum safety, the Giro Aries Spherical is a standout choice. Its ventilation is truly exceptional, employing a large number of well-sized vents supported by internal channeling that actively pulls air over the scalp. This makes it an ideal helmet for climbing, riding in hot climates, or for any cyclist who generates significant heat. The helmet's safety credentials are equally impressive, achieving one of the best scores in the independent Virginia Tech Helmet Lab tests. This protection comes from Giro's proprietary MIPS Spherical technology, where two layers of EPS foam rotate against each other like a ball-and-socket.
This design integrates the rotational protection directly into the helmet's structure, eliminating a separate plastic liner and potentially improving both comfort and airflow. The fit is generally comfortable with a good retention system, though the unique construction can require a bit more effort to slide the helmet into the perfect position. The aesthetic is more rounded and traditionally vented compared to sharp aero designs, which will appeal to many. While it offers less outright aerodynamic benefit than a dedicated aero helmet, the Giro Aries Spherical excels in its core missions: keeping the rider cool and providing top-tier impact protection, making it a superb all-rounder for performance-oriented riding where temperature management is key.