what does respiration do in minecraft

In Minecraft, Respiration is a helmet-only enchantment that increases the players breathing time when they are underwater. Without any enchantments or potion effects, players can hold their breath for approximately 15 seconds before running out of air and starting to drown. Respiration elongates the amount of time that a player can stay submerged under the water before drowning, and the difference is astronomical. The enchantment increases breathing time by 15 seconds per enchantment level in addition to the default time of 15 seconds, and it grants a chance of reducing the amount of drowning damage taken. With a level 3 Respiration enchanted helmet, players get 45 extra seconds of breathing underwater. The enchantment also reduces the amount of drowning damage taken, meaning players receive only 1 damage rather than the typical 2. The Respiration enchantment can be added to any helmet or leather cap using an enchanting table, anvil, or game command.