Details about XMAS

Xmas is a Limited Boost.
Boosts give you the ability to fly with your Battle-Car and make freestyles and aerial goals. It depends on your Battle-Car how many boost trails your car has. You can equip them inside the customization window in the rocket boost tab.
You can get limited items during special events.
You can search for trade offers with Xmas here.

NameRarityType
Xmas Limited Boost