Premium High Performance Snowmobile Neck Brace. Snowmobile neck brace for on the body fit from the biomedical engineers and medical staff of the Leatt® research lab. The SNX 5.5 neck brace is truly one of the most technologically advanced neck braces in the world. The SNX 5.5 balances the need of comfort, effectiveness and safety by allowing freedom of movement and adjustability to more closely meet the needs of top level racers. Leatt®'s commitment to safety ensures that key safety features pioneered by Leatt® are built into each brace. CE tested and certified as Personal Protective Equipment 89/686/EEC. Arctic Fusion Compound™ (AFC™) - a special blend to withstand extremely cold conditions. 5.5 / 6.5 helmet rim striking platform design for a biomedical balanced head and helmet freedom of motion. Three-way adjustability.