Winged Shoes

Winged shoes are a gift from Hermes to his children, members of the Hermes cabin.

Use
The shoes look like basketball shoes, and at the word 'Maia' they sprout wings and lift you in the air. If the word is spoken when the wings are out, then the wings shrink back into the shoes and they descend.

Luke gave Percy his pair that had been given to him by his father. However, they were cursed, in order to drag Percy down to Tartarus. Percy escaped this inadvertly by giving the shoes to Grover, and the shoes fell off of Grover, as they didn't fit him.