Your helm turns aside lethal blows.
Prerequisites
Dented Helm, Hard-Headed, base attack bonus +11, dwarf.
Benefit
When wearing a helmet, you add +1 to your AC against critical hit confirmation rolls; this benefit stacks with Dented Helm. When you use Dented Helm to deflect a critical hit, you may apply all damage from the critical hit to your helmet before applying any damage to yourself. If you take no damage, any additional effects, such as critical feats or poison, are negated.