Participants in interactive vaulting services must wear what type of helmet?

Participants in interactive vaulting services must wear a helmet certified by ASTM-SEI or an international-equivalent for equestrian use because these helmets are specifically designed to provide the necessary protection for activities involving horses. The ASTM (American Society for Testing and Materials) and SEI (Safety Equipment Institute) certification ensure that the helmets meet stringent safety standards relevant to equestrian sports, which can involve significant risk of head injury due to falls or collisions.

Helmets meant for equestrian use are constructed to absorb impact and are typically equipped with features that support stability and proper fit, which are critical while engaging in vaulting, where participants perform artistic movements on a moving horse. The proper helmet is important not just for compliance with safety regulations, but also for protecting the rider's health and well-being.

Comparatively, a standard bicycle helmet is designed for different types of impact and does not offer the same level of protection suitable for equestrian activities. Similarly, any form of headgear that fits or a soft cap for comfort would not meet the necessary safety standards and could expose participants to a higher risk of injury in the event of an accident. These alternatives lack the specific design features and protective capabilities that certified equestrian helmets provide.