Neck Brace 5.5The Leatt 5. 5 neck brace offers ultimate protection without compromising on comfort. The flagship product of the brand, Leatt neck braces are proven to reduce neck forces and neck injuries. The collarbone cut out keeps your helmet rim away from fragile bones, and the rear strut is designed to break away before applying excessive pressure to the back. The 5. 5 neck brace is extremely comfortable and durable. It is lightweight, manufactured from