The design of the Leatt® ADVenture prevents the helmet/head from projecting over the brace and therefore prevents a fulcrum action, which has been documented in literature pertaining to the use of collar devices. The Leatt® ADVenture works with most types of body armor and chest protectors. Over long distances, the Leatt® ADVenture will also offer some relief from neck fatigue. The Chest-Strap (for upright riding position) included with the Leatt® ADVenture is designed for the rider who may experience big air and flat-out whoop situations (motocross). Note: Not all riders will find the Chest-Strap necessary. The Leatt® ADVenture is compatible with all motorcycle helmet types and our design allows riders an adequate range of movement. The Leatt® ADVenture is designed for use on all motorcycles and ATVs for competition use, recreational riding and daily commuting. Leatt-brace® has been tested by BMW Munich, KTM Works Riders, the SABS (South African Bureau of Standards). It is also endorsed by MSA (Motorsport South Africa).