Armor enchantments in Minecraft are four separate builds that have to work as one set. The core is boring on purpose — Protection IV, Unbreaking III, Mending, four times over — and the actual decisions live on your boots, your helmet, and in three treasure books the enchanting table will never give you.
Here's the full set for Java 26.2: the real math behind Protection, the per-slot picks, and where the treasure enchantments actually drop.
The full set at a glance
| Enchantment | Max | Slot | What it does |
|---|---|---|---|
| Protection | IV | Any | 4% less damage per point; full IV set = 64%, cap 80% |
| Fire Protection | IV | Any | Counts double vs fire/lava + shortens burn time |
| Blast Protection | IV | Any | Counts double vs explosions + less blast knockback |
| Projectile Protection | IV | Any | Counts double vs arrows, tridents, fireballs |
| Feather Falling | IV | Boots | The single biggest fall-damage cut; stacks to the 80% cap |
| Depth Strider | III | Boots | Full walking speed underwater at III (excl. Frost Walker) |
| Respiration | III | Helmet | +15 s of air per level; pairs with Aqua Affinity |
| Swift Sneak | III | Leggings | Near-full speed while sneaking (Ancient City only) |
| Thorns | III | Any | Chance to reflect damage; eats durability — skip on main set |
| Mending | I | Any | XP repairs the piece being worn — armor's forever engine |
The Protection math, in one paragraph
Every protection enchantment grants protection points: plain Protection gives 1 per level, the specialists give 2 per level against their own damage type. Each point shaves 4% off incoming damage, capped at 20 points (80%). Full Protection IV = 16 points = 64% off nearly everything. A full Blast Protection set would be 80% off a creeper blast — and 0% off the skeleton behind it. One protection type per piece, so the default is simple: Protection IV, four times, and let Feather Falling top up the fall-damage cap.
Boots are the interesting slot
Feather Falling IV is non-negotiable — with the full set it caps fall damage reduction at 80%. The choice is Depth Strider III (swim like you walk) versus Frost Walker II (walk on frozen water, treasure-only) — they can't coexist. Depth Strider wins for general play; Frost Walker is a commuting trick. Soul Speed (piglin bartering and bastion chests) makes soul sand fast at the price of boot durability — a nether-highway special.
Helmet and leggings
Respiration III adds 45 seconds of air and Aqua Affinity restores normal mining speed underwater — together they make ocean monuments and underwater bases a non-event. Leggings have exactly one special: Swift Sneak, exclusive to Ancient City loot, which turns the deep dark's mandatory crouch-walking from a crawl into a stroll. If you see the book, take the detour.
Thorns: the trap pick
Thorns III sounds free — attackers take damage for hitting you. In practice each proc spends extra durability from the armor, the reflected damage is a dice roll, and it does nothing to stop the hit itself. Put those levels into a real enchantment. The one home Thorns has: AFK fish-farm armor, where Mending repairs faster than Thorns spends.
Common mistakes
- Mixing protection types across the set to "cover everything" — you end up under the cap against everything instead of at 64% against everything.
- No Mending on a piece. One unmended piece quietly dies while the rest of the set lives forever.
- Enchanting armor before you have the treasure books. Adding Mending or Swift Sneak later costs prior-work penalty — collect first, combine once.
- Frost Walker on your only boots. It replaces Depth Strider and turns every ocean swim into a slog.