Armor Flaws (Optional)
You can select a flaw from the following list.
Flimsy: Reduce either the armor’s EAC bonus or its KAC bonus by 1. You can’t select this flaw if it would reduce the bonus below +0.
Minimalist: Reduce the armor’s number of upgrade slots by 50%, rounding the number of slots down.
Rigid: Increase the armor’s armor check penalty by 1, and reduce the armor’s maximum Dexterity bonus by 1 (minimum +0). You can’t choose this flaw if the armor’s maximum Dexterity bonus is already +0.
Vulnerable: Choose acid, cold, electricity, fire, or sonic damage. The chosen energy type triggers catastrophic side effects for your armor, such as your armor being especially flammable, conducting electricity painfully well, or amplifying sound waves. When you take damage from the chosen energy type, you increase the damage taken by an amount equal to half the armor’s item level (rounded up).
Source
Starfinder Enhanced pg. 142