Armor

Your Armor Class (AC) measures how well you can defend against attacks. When a creature attacks you, your Armor Class is the DC for that attack roll.
Use your proficiency bonus for the category (light, medium, or heavy) or the specific type of armor you're wearing. If you're not wearing armor, use your proficiency in unarmored defense.

Getting in and out of armor is time consuming—so make sure you're wearing it when you need it! Donning and removing armor are both activities involving many Interact actions. It takes 1 minute to don light armor, 5 minutes to don medium or heavy armor, and 1 minute to remove any armor.

The galaxy is a vast and wondrous place, with countless dangers and worlds within it, but space is inhospitable and incredibly deadly. Every type of modern armor has built-in environmental protections which, when activated, protect you from the vacuum of space. These protections allow you to survive for a few days if you must make repairs to the hull of a starship, explore an airless alien world, or endure exposure to an environmental breach while trapped inside a space station. Some armors do this through an environmental field (a minor force field specially tuned to protect from a vacuum that doesn't reduce damage from attacks), while others can be closed with helmets and airtight seals. While using your armor's environmental protections, your armor can protect you from the dangerous environmental effects of a vacuum and can facilitate self-contained breathing. This allows you to survive and breathe while within a thick or thin atmosphere, in a vacuum, or while submerged in liquid (the safety seals and rebreather offer no protection from the effects of damaging liquids, such as acid or lava). Armor protection doesn't protect you from smoke inhalation, inhaled poisons, toxic atmospheres, or corrosive atmospheres.
Armor environmental protections work only while within a thick or thin atmosphere, a vacuum, or non-hazardous liquid. In all other environments, armor is designed to cycle down, refill its air supply, and filter in the surrounding environment by entering low-power mode. This enables the armor to conserve power and air for unexpected emergencies, and to ensure its delicate systems are constantly operating at peak efficiency. To protect yourself from other environmental dangers, such as radiation, you can install armor upgrades into your armor's upgrade slots.
Armor Protections: All armors, except those with the exposed trait, allow you to breathe and survive in a thick or thin atmosphere, a vacuum, or in non-hazardous underwater environments. This does not prevent inhaled toxins or similar effects from entering your armor's systems. Ancestries like kalo that require specific environmental conditions to survive can easily obtain or modify armor to suit these needs. The wearer can activate or deactivate an armor's protections with an Interact action. A suit of armor's environmental protections last for a number of days equal to its item level (minimum 1 day).

The Armor table provides the statistics for the various forms of protection without wearing armor and for suits of armor that can be purchased and worn, organized by category. The columns in the table provide the following statistics.

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.