The Aerobic Assassin skin is an Epic Fortnite outfit. Aerobic Assassin was available via the Item Shop for 1500 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite Aerobic Assassin Outfit Details
Flex your victory muscles.
Fortnite Aerobic Assassin Outfit PNG Images
Here is the PNG images of Aerobic Assassin below!