Rainbow Fog

Rainbow Fog is a Wrap in Fortnite: Battle Royale that could be unlocked by linking a Houseparty account to your Fortnite account. It first became available on November 18th, 2020.

It was also available to users who played five matches of Fortnite with friends between November 20th and November 26th, 2020 because Houseparty is not available on all platforms.

Cosmetic Review
It has the colors of a rainbow and transforms into different colors being foggy.