Tabi

The Tabi is a rare Hardmode accessory dropped by Bone Lee, who spawns in the Dungeon after Plantera has been defeated. It allows the player to perform a dash attack by double-tapping the or  key. The dash ability has a one-second cooldown between uses.

Trivia

 * Tabi are traditional Japanese socks that are ankle high, with a separation between the big toe and the other toes.