Wings of Valor are an aesthetic item for Diablo III, based on the wings of Imperius. They are available to those who pre-ordered Reaper of Souls. Those who pre-ordered the digital version have the wings automatically sent to any character they create. Those who pre-ordered a retail version had until 11:59 PM PST on March 31, 2014 to redeem the item via their battle.net account.
When obtained, they can be added to Wardrobe. Only one set of Wings can be used at a time. If equipped, they will be visible even in character selection screen.
"With valor, all things become possible. Strike with every ounce of righteous wrath you possess, and you shall be lifted on high by wings of valor." — Imperius