The HJC Adwatt is a time trial (TT) helmet that, along with Victor Campenaerts, set the UCI hour record in 2019, partly due to its low aerodynamic drag.

This helmet is specifically designed with a focus on aerodynamics, making it competitive compared to traditional cycling helmets. The HJC Adwatt has been tested both in HJC's wind tunnel and in real-world conditions to provide optimal results. In addition to its low aerodynamic drag, the design process emphasized optimal airflow through the helmet for excellent ventilation. Using pressure differences, cold air from the front of the helmet is transported to the rear for better heat distribution. Increased airflow is also ensured through venturi technology.

To enhance rider safety, this helmet is constructed using HJC's In-Mold technology, reinforcing the helmet and providing improved protection.

Specifications and features:

• Tested in a wind tunnel
• Aerodynamic design
• Designed with venturi technology
• Constructed using In-Mold technology
• Includes visor, wash bag, and travel case

Helmet weight is 260 (+/- 10) grams without the visor and 320 (+/- 10) grams with the visor.