The Order of Secrets
Heavy Armor is related to Durable Body and Armored Body and like those skills works in combination with the Enduring Form skill. It adds 1 point of ‘Armor’ for each rank of Enduring Form, providing the maximum protection possible. On the other hand it slows reaction speed and movement.
Heavy Armor almost always looks like what it is when manifest. Classic Heavy Armor often looked like plate mail. Modern heavy armor looks look heavy body armor or even some sort of sci-fi combat suit.