Armor Perks
You can select perks from the following list.
Adaptive Fashion: Choose three 1st-level clothing personal items (such as those presented on page 230 of the Core Rulebook). As a full action, you can adjust your armor to provide yourself the benefits of one of these sets of clothing. This effect lasts until you use a full action to instead gain the benefits of one of the other chosen sets of clothing. This adjustment doesn’t hide the fact that you’re wearing armor, but it might alter the armor’s cosmetics.
Ample Upgrades*: Increase the armor’s number of upgrade slots by 1.
Antiradiation Weave: When you fail a saving throw against initial exposure to radiation while wearing this armor, you can spend 1 Resolve Point to reroll the saving throw without the armor’s circumstance bonus to saving throws and use the higher result.
Deflective (design): Increase the armor’s EAC bonus by 1. This can’t cause the armor’s EAC bonus to exceed its KAC bonus.
Environmental Endurance: The armor’s larger internal batteries double the amount of time you can operate the armor’s environmental protections to 2 days per item level.
Flexible*: Reduce the armor’s armor check penalty by 1 (minimum 0).
Heavy Duty (design): Increase the armor’s EAC bonus by 1, increase its KAC bonus by 1, and increase its armor check penalty by 1.
Massive (design): Increase the armor’s EAC bonus by 2, increase its KAC bonus by 2, increase its armor check penalty by 1, decrease its maximum Dexterity bonus by 1, and increase its speed adjustment penalty by 5 feet (e.g., a speed adjustment of –5 feet becomes –10 feet). This perk can’t be applied to light armor.
Reinforced (design): Increase the armor’s KAC bonus by 1.
Resistant: Choose acid, cold, electricity, fire, or sonic damage. The armor dissipates this form of energy especially well, granting you resistance to that energy type equal to the armor’s item level divided by 3 (rounded up).
Responsive*: Increase the armor’s maximum Dexterity bonus by 1.
Source
Starfinder Enhanced pg. 142