These are the cat gloves available from Felissimo and YOU + MORE that have a cat printed on them, including its tail on the index finger. The gloves can be used to operate a smartphone, and it looks like the cat is wagging its tail whenever you swipe. People are weird, that is a fact.
Keep going for a video of the tail wagging in action.
Thanks to Lydia, who's convinced novelty tail-finger gloves are going to be all the rage this holiday season.