Breath of Wind

The Breath of Wind is a reagent used in various crafts.

Source
Breath of Wind can be found on any air-based elementals in Tanaris or Silithus.

Breath of Wind as a quest item
Breath of Wind is needed for the following quests:
 * (Alliance)
 * (Horde)

Breath of Wind as an ingredient
Breath of Wind is used in the following recipes:

Blacksmithing

 * Light Skyforged Axe
 * Phantom Blade
 * Truesilver Champion
 * Windforged Leggings

Enchanting

 * Enchant Cloak - Greater Resistance

Jewelcrafting

 * Figurine - Truesilver Boar

Leatherworking

 * Blackstorm Leggings