Leatt DBX 5.5 Neck Brace (Black, Small/Medium) Totally new chassis design made of fiberglass reinforced polyamide with a helmet rim striking platform for increased head and helmet freedom of motion 5-way adjustability, siding front and rear SureFit adjusters to ensure optimum fit and 4-angle rear thoracic strut adjustments to fit more body shapes Adjustable over the shoulder height for optimizing freedom of motion for different neck lengths and helmet rim profiles Sculptured, split front for improved comfort and fit and the new CoreFlex split rear thoracic strut for additional comfortable and designed to work with the body's natural movements Thoracic rear strut is engineered to snap off before applying excessive pressure to the back