Terrarian adventurers have a lot of neat accessories to help them scout
their world, but one of the desirable ones is the Rocket Boots. These boots bestow the wearer with the ability to launch into the sky with impressive velocity. It's like having your very own personal rocket propulsion system strapped to your feet! Wearing the rocket boots permits players to get to previously inaccessible altitudes, making exploration easier. With these boots, Terraria becomes a true vertical adventure!
Boots Official Terraria Wiki