Lightweight and firm plates made of titanium are perfect to protect the neck in medieval combat. Their weight is minimal, but at the same time they are durable as steel and can withstand hit into such a dangerous place. Side plates are made of segments and connected. So they will not interfere you from turning your head in battle, and will be able to protect you from a strike. The back plate is made solid to better withstand a hit into the seventh vertebra. Together they form a collar that will cover your neck and collarbone from all sides. You will be able to place and adjust them as you see fit.
Order and feel confident.