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.
You start with it. Jin recovers it in Komoda Town after he is rescued from the beach and wears it for the first attempt on Castle Kaneda.
Swap to the Traveler's Attire or the Samurai Clan Armor as soon as you can. The rebuilt look is close but not perfect, because the helmet rope differs from the original.
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.
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.
Fundoshi
The Fundoshi is a loincloth outfit you earn by resting at 18 Hot Springs in Ghost of Tsushima. It has one trick: running and sprinting make no noise, so you can rush up behind enemies for assassinations without crouching.