Your class gives you proficiency with certain types of armor. If you wear armor that you lack proficiency with, you have disadvantage on any ability check, saving throw, or Attack roll that involves Strength or Dexterity, and you can’t cast Spells.

Leather armor, two daggers, and thieves' tools; Expertise. At 1st level, choose two of your skill proficiencies, or one of your skill proficiencies and your proficiency with thieves' tools. Your proficiency bonus is doubled for any ability check you make that …

Armor (light, medium, or heavy), rare (+1), very rare (+2), or legendary (+3) You have a bonus to AC while wearing this armor. The bonus is determined by its rarity.

Armor (studded leather), rare. While wearing this armor, you gain a +1 bonus to AC. You can also use a bonus action to speak the armor's command word and cause the armor to assume the appearance of a normal set of clothing or some other kind of armor.

The AC bonus of the armor increases to +3. While you are transformed by an effect that replaces any of your game statistics with those of another creature, your bonus to melee attack and damage rolls increases by 1 (to +3).

Strange rituals have repurposed the body of a flesh golem into this partially sentient suit of leather armor. While wearing this armor, you gain a +1 bonus to AC and to saving throws against spells and other magical effects.

Armor (light, medium, or heavy), uncommon. While wearing this armor, you have a swimming speed equal to your walking speed. In addition, whenever you start your turn underwater with 0 hit points, the armor causes you to rise 60 feet toward the surface. The armor is decorated with fish and shell motifs.

Armor (light, medium, or heavy), uncommon (requires attunement) This armor has 5 charges. While you wear it, you can use a bonus action to expend 1 or more charges to cast one of the following spells from the armor, targeting yourself: Jump (1 charge) or Levitate (2 charges).

Components: V, S, M (a piece of cured leather) Duration: 8 hours. You touch a willing creature who isn’t wearing armor, and a protective magical force surrounds it until the spell ends. The target’s base AC becomes 13 + its Dexterity modifier. The spell ends if the target dons armor or if you dismiss the spell as an action. Spell Lists ...

Armor (leather), very rare (requires attunement) You gain a +1 bonus to AC while wearing this armor. The coat has 3 charges. When you hit a creature with an attack and that creature doesn't have all its hit points, you can expend 1 charge to deal an extra 1d10 necrotic damage to the target. The coat regains 1d3 expended charges daily at dawn.