Frostspark Boots

Frostspark Boots are an accessory crafted by combining Lightning Boots and Ice Skates together at a Tinkerer's Workshop. It has essentially the same functionality as Lightning Boots, but the running capabilities are even greater so you run much faster.

Trivia
They were incorrectly called "Sparkfrost Boots" in the Terraria 1.2.1.2 changelog.