The NBA 75 Flex skin is an Uncommon Fortnite outfit. NBA 75 Flex was available via the Item Shop for 800 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite NBA 75 Flex Skin Details
Fortnite NBA 75 Flex Skin PNG Images
Here is the PNG images of NBA 75 Flex below!