The Aventor is designed as a lightweight helmet and accomodates people with long hair. 

Specifications:

• Double shell In-Mold for durable fusion of the outer shell and the shock absorbing helmet material (EPS)
• Ponytail compatibility: Helmet good for people with long hair
• Half-surrounding plastic ring connected to adjustment system
• Lower edge protection: Provides the helmet with additional protection from external influences
• ActiCage: Structural reinforcement integrated into the EPS to optimize stability
• Zoom Ace: Fine adjustment system with handy dial for personalized fit
• Weight: Large (300g)

 *Images from ABUS