The Witcher 3 Armor Sets

Armor type

Note: you have to learn and use the skill to apply the appropriate effect.

Armor type	Description	Related skill	Skill description
Light	Increases Armor and Stamina generation	Cat school techniques	Each piece of light armor increases critical hit damage by 25% and fast attack damage by 5%
Medium	Increases Armor	Griffin school techniques	Each piece of medium armor increases Sign intensity by 5% and Stamina regeneration by 5%.
Heavy	Increases Armor and decreases Stamina generation	Bear school techniques	Each piece of heavy armor increases maximum Vitality by 5% and strong attack damage by 5%.

Set bonuses

Note: set bonuses apply only to Grandmaster level items.

Feline	Bonus for 3 pieces Strong Attacks increase Fast Attack damage for 5 seconds by 10% for each piece of the set. Bonus for 6 pieces Rear attacks deal 50% more damage, also stun opponents at the cost of 1 Adrenaline Point(s).
Griffin	Bonus for 3 pieces After using Stamina to cast a Sign in its standard mode, the next Sign cast within 3 seconds will be cast in standard mode without using Stamina. Bonus for 6 pieces The size of Yrden traps is increased by 40%. While you are within an Yrden trap, Stamina regeneration is increased by 5/s and Sign Intensity by 100%, and damage is reduced by 20%.
Wolven	Bonus for 3 pieces Up to three different oils can be applied to a sword at a time. Bonus for 6 pieces Bombs are thrown without any delay.
Ursine	Bonus for 3 pieces When a Quen shield shatters, there is a chance a new one will be cast at no Stamina cost. The bonus increases by 5% for each piece of the set. Bonus for 6 pieces Damage dealt by Abilities involving the Quen Sign is increased by 200%.
Manticore	Bonus for 3 pieces Critical hit chance and critical hit damage also apply to bombs. Bonus for 6 pieces The maximum number of charges for each alchemy item is increased by 1.