Heavy armor

From NWN2Wiki

Heavy armor is a form of armor that requires the armor proficiency (heavy) feat to equip and use effectively, and is worn in the Armor slot. It provides a lot of protection from physical attacks by effectively encasing the character in a solid shell. Unfortunately this hinders alot of movement so is not very popular among characters who rely on dexterity or those vulnerable to arcane spell failure.

This type of armor includes: Banded mail, Splint mail, Half-plate, and Full plate.