The Rocket Boots are a late game item that is used for flying. When wearing the Rocket Boots the player can hold down the SNEAK KEY to fly.
Note that they don't use any kind of power, being essentially an infinite flying accessory.
Ingredients: 2x Feather, 16x Diamond, 64x End Stone, 1x Iron Boots, 16x Redstone Block, 1x Lava Bucket
The picture bellow shows a player using the Rocket Boots to fly.
