Amor Skills in ESO provide bonuses based on which type of armor you have equipped out of Light Armor, Medium Armor or Heavy Armor.
All types of Armor grant Armor (Physical Resistance), Spell Resistance (Magical Resistance) and Armor Passives. Armor and Spell Resistance come with the particular equipment you wear. Armor Passives are what is listed below and must be purchased with Skill Points in order to work. As you wear a particular type of Armor you will gain EXP in that Skill Line (Light, Medium, Heavy) which will allow you to purchase the higher level Armor Passives.
It is often wise to wear all three Armor types when you first begin your character in ESO as this allows your character to gain EXP in all three Armor types so then in the future if you choose to specialize in one type or another they will all be slightly levelled.
Take a look below to see the Armor Passives for yourself.
ESO Armor Skills
|Skill Type||Armor Type||Skill Line||active_passive||Unlocks At||skill_img||Skill Name||Skill Description||Morph Effect||Cast Time||Target||Range||Radius||Duration||Cost||Morph 1||Morph 2||Base Skill||is_morph||stamina_morph||skill_id|
|Armor||Light Armor||Light Armor||Active||22||Annulment||Reduces the Magicka cost of spells by 3% per piece of Light Armor equipped. Surround yourself with a net of magic negation to absorb up to 6801 damage over 6 seconds.||Instant||Self||6 Seconds||4223 Magicka||Dampen Magic||Harness Magicka||0||385|
|Armor||Light Armor||Light Armor||Active||22||Dampen Magic||Surround yourself with a net of magic negation to absorb up to 6801 damage over 6 seconds.|Amount of damage absorbed is increased by 6% for each piece of Light Armor equipped.||Increases shield strength based on number of Light Armor items equipped.||Instant||Self||6 Seconds||4223 Magicka||Annulment||1||386|
|Armor||Light Armor||Light Armor||Active||22||Harness Magicka||Surround yourself with a net of magic negation to absorb up to 6801 damage over 6 seconds.|While active, up to three times when spell damage is absorbed, you restore 600 Magicka. This bonus increases by 6% for each piece of Light Armor equipped.||Absorbs Magicka based on number of Light Armor items equipped.||Instant||Self||6 Seconds||4223 Magicka||Annulment||1||387|
|Armor||Light Armor||Light Armor||Passive||2||Evocation||Reduces the Magicka cost of spells by 1%/2%/3% per piece of Light Armor equipped.||0||388|
|Armor||Light Armor||Light Armor||Passive||6||Recovery||Increases Magicka Recovery by 2%/4% per piece of Light Armor equipped.||0||389|
|Armor||Light Armor||Light Armor||Passive||14||Spell Warding||Increases your Spell Resistance for each piece of Light Armor equipped.||0||390|
|Armor||Light Armor||Light Armor||Passive||38||Prodigy||Increases your Spell Critical rating by 1095/2191.||0||391|
|Armor||Light Armor||Light Armor||Passive||42||Concentration||Increases your Spell Penetration by 2442/4884.||0||392|
|Armor||Medium Armor||Medium Armor||Active||22||Evasion||Shroud yourself in mist to gain Major Evasion, which increases your dodge chance by 20% for 20 seconds.||Instant||Self||4320 Stamina||Shuffle||Elude||0||393|
|Armor||Medium Armor||Medium Armor||Active||22||Shuffle||Shroud yourself in mist to gain Major Evasion, which increases your dodge chance by 20% for 23 seconds.|While wearing Medium Armor, removes and grants immunity to snaring effects. Increases snare immunity duration by .5 seconds for each piece of Medium Armor equipped up to 3.5 seconds.||Removes snares.||Instant||Self||4320 Stamina||Evasion||1||394|
|Armor||Medium Armor||Medium Armor||Active||22||Elude||Shroud yourself in mist to gain Major Evasion, which increases your dodge chance by 20% for 23 seconds.|Duration is increased 5% for each piece of Medium Armor equipped.||Gain additional duration for each piece of Medium Armor equipped.||Instant||Self||4320 Stamina||Evasion||1||395|
|Armor||Medium Armor||Medium Armor||Passive||2||Dexterity||Increases your Weapon Critical rating for each piece of Medium Armor equipped.||0||396|
|Armor||Medium Armor||Medium Armor||Passive||6||Wind Walker||Increases Stamina Recovery by 2%/4% per piece of Medium Armor equipped.|Also reduces the Stamina cost of abilities by 2%/3% per piece of Medium Armor equipped.||0||397|
|Armor||Medium Armor||Medium Armor||Passive||14||Improved Sneak||Reduces the cost of sneaking by 4%/7% per piece of Medium Armor equipped.|Also reduces the size of your detection area by 3%/5% per piece of Medium Armor equipped.||0||398|
|Armor||Medium Armor||Medium Armor||Passive||38||Agility||Increases your Weapon Damage by 6%/12%.||0||399|
|Armor||Medium Armor||Medium Armor||Passive||42||Athletics||Increases your movement speed while using Sprint by 2%/3% and reduces the cost of Roll Dodge by 2%/4% per piece of Medium Armor equipped.||0||400|
|Armor||Heavy Armor||Heavy Armor||Active||22||Immovable||Intensify your physical presence to gain Major Resolve and Major Ward, increasing Physical Resistance and Spell Resistance by 5280 for 13.5 seconds.|Also grants you immunity to knockback and disabling effects for 5 seconds.||Instant||Self||13.5 Seconds||4860 Stamina||Immovable Brute||Unstoppable||0||401|
|Armor||Heavy Armor||Heavy Armor||Active||22||Immovable Brute||Intensify your physical presence to gain Major Resolve and Major Ward, increasing Physical Resistance and Spell Resistance by 5280 for 15 seconds.|Also grants you immunity to knockback and disabling effects for 5 seconds.|While slotted, the Stamina cost of breaking free from a disabling effect is reduced for each piece of Heavy Armor equipped.||Break Free costs less.||Instant||Self||15 Seconds||4860 Stamina||Immovable||1||402|
|Armor||Heavy Armor||Heavy Armor||Active||22||Unstoppable||Intensify your physical presence to gain Major Resolve and Major Ward, increasing Physical Resistance and Spell Resistance by 5280 for 15 seconds.|Also grants you immunity to knockback and disabling effects for 5 seconds.|Effect's duration is increased for each piece of heavy armor equipped.||Duration increased based on Heavy Armor equipped.||Instant||Self||15 Seconds||4860 Stamina||Immovable||1||403|
|Armor||Heavy Armor||Heavy Armor||Passive||2||Resolve||Increases your Physical Resistance and Spell Resistance for each piece of Heavy Armor equipped.||0||404|
|Armor||Heavy Armor||Heavy Armor||Passive||6||Constitution||Increases Health Recovery by 2%/4% per piece of Heavy Armor equipped.|Also restores Magicka and Stamina each time you are hit, but only once every 8/4 seconds. Amount restored is increased per piece of Heavy Armor equipped.||0||405|
|Armor||Heavy Armor||Heavy Armor||Passive||14||Juggernaut||Increases Max Health by 1%/2% per piece of Heavy Armor equipped.||0||406|
|Armor||Heavy Armor||Heavy Armor||Passive||38||Wrath||Gain 10/20 Weapon and Spell Damage for 6 seconds when you take damage, stacking up to 10 times.||0||407|
|Armor||Heavy Armor||Heavy Armor||Passive||42||Rapid Mending||Increases your healing received by 4%/8% and increases the Magicka or Stamina your Heavy Attacks restore by 25%/50%.||0||408|