Neck braces serve to protect your cervical spine. But, they can only perform this essential task when combined with a full-face helmet. These stable collars prevent overstretching of the neck and distribute impact forces over a larger area (thus protecting against spinal injuries). As with any piece of protective clothing, it's important that a neck brace fits both your body and your equipment. Most manufacturers offer their models in several sizes and for different rider weights. When buying, you should also check whether your chosen neck brace can be easily combined with your own full-face helmet and safety jacket.