This hoverboard doesn't have any unlockable upgrades.
Sleigh is a hoverboard in Subway Surfers. Like any other hoverboard, it protects you from crashing for 30 seconds. When crashed, it will explode and need a few seconds to recharge. Like most of others limited hoverboards, it costs 50,000.
Appearance[]
It has the appearance of a decorated blue and cyan sleigh with some ice shards starting to spread around the back.