Crusader clothing was is composed of tunics, surcoats, and capes. The Crusaders wore surcoats to insulate their body from the heavy armour, because the heat of the sun would heat the armour and literally burn them. The Crusader surcoats also circulated air in to the knights armour being open on the bottom, something like a ventilation system. Not in most history books, Crusader Knights had so much armour that it would take forever to take it off, the tunics being opened on the bottom provided a way for a knight to relieve himself. Most of our Crusader clothing also comes with symbols of the Templer Knight, Hospitalers, and Teutonic Knights.