The Hero of Tsushima Armor is a bonus set from the Digital Deluxe, Special, Collector's and Director's Cut editions. It gives a strong early boost to health and damage reduction, and it unlocks once you finish the Prologue and start Act 1.
Own one of the editions above. After the Prologue, once Act 1 begins, the set appears in your gear.
It is a big help early on, but its edge fades as you earn and upgrade the story sets. The design borrows from the Samurai Clan Armor's Spring Lion dye and carries the Adachi clan emblem on the helmet.
Archery Master's Attire
The Archery Master's Attire is Sensei Ishikawa's outfit, once a New Game+ armor set and now a dye for Tadayori's Armor. Its archery perks match a fully upgraded Tadayori's Armor, and you buy it from Baku the Voiceless with Ghost flowers.
Armor
Armor sets are the outfits Jin wears in Ghost of Tsushima, and the body piece is the only gear that changes how you play. Each set leans toward a style, such as archery, stealth, standoffs or tanking hits, so swapping sets is how you build for the fight ahead.
Broken Armor
The Broken Armor is the damaged samurai armor Jin wears through the Prologue after the Battle of Komoda Beach. It is the only set with no perks at all and it cannot be upgraded, so wear it only for the look or as a self-imposed challenge.
Deadly Rival's Attire
The Deadly Rival's Attire is Ryuzo's outfit, which Baku the Voiceless sells for 50 Ghost flowers in New Game+ only. It gives a massive health boost, major melee damage and stronger Ghost weapons, and it has no upgrades.