Base Utility Modules - These can be obtained from Experimental Armor Modules in Proving Ground

1. Shieldwall Module
   
2. Wraith Module
   
3. Grapple Module
   
4. Heavy Ordnance Module - Grenade slot + additional use of grenade equipped in this slot
   
5. Bandolier Module - Ammo slot
   
6. Armor Plating Module - This hefty module gives a lot of protection with penalty to mobility. Gain 3 armor and lose 1 mobility.
   
7. Sprinter Module - Swaps out some heavy pieces on the armor for lighter ones with small penalty to defense. Gain 2 mobility and lose 10 defense.
   
8. Psi Shield Module - Makes use of innate Psi potential to generate ablative hit points. Minimum of 2 ablative.
   
9. Adreno Flight Module - Gain 3 mobility for 2 turns when taking damage.
   
10. Shield Generator Module - A very potent solution for the survival of our soldiers. Provides 2 ablative points and regenerates 2 points per turn for a maximum of 6.

Special Upgrade

1. Smart Slot Module - When slotted, it gives an additional upgrade slot to the armor and disables mutual exclusions on upgrade types so you could use 2 vest upgrades. Buildable when Codex Brain research is completed in Shadow Chamber.

Companion Modules - these are of type 'utility' but they are slightly different in a sense that they require another upgrade to be slotted in first e.g. Plated Vest Companion Module requires Plated Vest.They are buildable whenever you have the main module in your inventory/already slotted into an armor.

1. Plated Vest Companion Module - When used with Plated Vest Module, the module no longer provides armor but instead reduces incoming damage by 20%.
   
2. Hazmat Vest Companion Module - When used with Hazmat Vest Module, provides 66% damage reduction in explosive attacks.
   
3. Stasis Vest Companion Module - When used with Stasis Vest Module, gain additional 1 HP per turn (not counted towards Max Heal amount) and restore 10% of Will.