Damage Reduction (effect)
From Talus Wiki
Damage Reduction represents a creature’s ability to ignore a certain amount of melee damage (bludgeoning, slashing, or piercing) from a single hit unless the weapon inflicting the damage has an enhancement bonus equal to or greater than the Damage Reduction power. Damage Reduction is listed with the amount of damage ignored and the power of the weapon needed to penetrate the effect. Thus a creature with 20/+3 Damage Reduction ignores the first 20 points of damage from any weapon that does not have an enhancement bonus of +3 or greater. Non-melee damages such as from elemental or magical attacks ignore Damage Reduction.
Another type of Damage Reduction is expressed as 20/-. The '-' means that all enchantments are affected. Even with a +20 weapon, the first 20 points of damage are ignored.
Damage Reduction is an ability of the Barbarian and Dwarven Defender classes and some feats and spells provide it as well. Some Druid/Shifter forms also include the effect.