Armor Specialization Effects
Source Player Core pg. 246
Certain class features can grant you additional benefits with certain armors. This is called an armor specialization effect. The exact effect depends on which armor group your armor belongs to, as listed below. Only medium and heavy armors have armor specialization effects.
Ceramic
Source Galaxy Guide pg. 246
Delicate yet sturdy, treated ceramic plating is common on spacesuits. It resists heat and other environmental hazards and is lightweight enough to fit into. You gain resistance to acid, cold, fire, and electricity damage equal to 1 + the armor's resilience value for medium armor, or 2 + the armor's resilience value for heavy armor.
Chain
Source Galaxy Guide pg. 246
This armor is so flexible it can bend with a critical hit and absorb some of the blow. Reduce the damage from critical hits by either 4 + the armor's resilience value for medium armor, or 6 + the armor's resilience value for heavy armor. This can't reduce the damage to less than the damage rolled for the hit before doubling for a critical hit.
Cloth
Source Galaxy Guide pg. 246
Nethys Note: there is no medium or heavy cloth armor, so there is no armor specialization effect for the cloth armor group.
Composite
Source Galaxy Guide pg. 246
The numerous overlapping pieces of this armor protect you from piercing attacks. You gain resistance to piercing damage equal to 1 + the armor's resilience value for medium armor, or 2 + the armor's resilience value for heavy armor.
Leather
Source Galaxy Guide pg. 246
The thick second skin of the armor disperses blunt force to reduce bludgeoning damage. You gain resistance to bludgeoning damage equal to 1 + the armor's resilience value for medium armor, or 2 + the armor's resilience value for heavy armor.
Plate
Source Galaxy Guide pg. 246
The sturdy plate provides no purchase for a cutting edge. You gain resistance to slashing damage equal to 1 + the armor's resilience value for medium armor, or 2 + the armor's resilience value for heavy armor.
Polymer
Source Galaxy Guide pg. 246
This flexible armor protects you from dispersed heat and force. You gain resistance to area damage equal to 1 + the armor's resilience value for medium armor, or 2 + the armor's resilience value for heavy armor.