Independently tested and proven to reduce neck forces. Up to 47% reduction of risk for a serious neck injury. Rigid, non-flexible Carbon matrix platform for lowest possible neck forces. CoreFlex split rear folding thoracic strut is more comfortable and designed to work with the body'd natural movements. Thoracic rear strut is engineered to snap off before applying excessive pressure to the back. Optimal helmet rim striking platform design for a biomedical balanced head and helmet freedom of motion. Three-way adjustability and sliding front and rear SureFit adjusters to ensure optimum fit. Three-angle rear thoracic strut adjustments to fit most body shapes. Sculptured, split front for improved comfort and fit. Low profile push-button open/closure system. Easy-to-use emergency released mechanism for injured riders. Engineered collarbone cut-out to help keep your helmet and brace away from your most fragile bones. Injected, durable and easy-to-clean foam padding. Air flow ribbed body padding for optimum ventilation. Free, optional clear chest strap included. CE tested and certified as Personal Protective Equipment 89/686/EEC. Weight: from 600g (1.32lbs). - Manufacturer recommended Roost Deflector fitments: Leatt Roost Deflectors - Rider tested Roost Deflector fitments: Thor Sentinel Roost Deflector, Thor Quadrant Roost Deflector, Atlas Defender Lite and Atlas Defender Roost Deflectors, Alpinestars A-8 and A-8 Lite Roost Deflectors, EVS Revolution 5 Roost Deflector, EVS Vex Roost Deflector and Fox Proframe LC Roost Deflector