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.
Building the full set? The enchantment calculator works out the cheapest anvil order so you never hit "Too Expensive".
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.