The Throwback BG skin is an Rare Fortnite outfit. Throwback BG was available via the Item Shop for 1200 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite Throwback BG Skin Details
Rep the W.
Fortnite Throwback BG Skin PNG Images
Here is the PNG images of Throwback BG below!