Leatt Neck Brace 4.5With 2 way thoracic adjustability for a great fit, it sits between the 3. 5 and 5. 5 in the way of adjustment and price. A composite matrix platform offers not only strength but also a very lightweight neck brace you wont know you're wearing. Our neck braces are designed to transfer potential injury producing forces away from the neck during an impact, to other body parts in a safe and efficient manner, thereby reducing your risk of a neck injury.