Talk:Defense Augments/@comment-181.194.109.9-20150131230238/@comment-24659969-20150201083307

It stacks multiplicative.

For example you have 10.000 base HP + 3000 HP from Toughness lv 10 (300 * 10) = 13.000 total HP, with body fueling augment 10 (+25%), you would have 16.250 HP

Vest mastery lv3 +2000 HP also stacks, you will also get additional +500 HP for each body fueling 10