Below, we've got everything you need to know about how to get it.
How to Get Fortnite Street Shadows Challenge Pack
You can see exactly what the pack looks like in the tweet from iFireMonkey down below.
The pack is part of the new Epic Games Mega Sale, but is free rather than being sold at a reduced price.
To claim it and add it to your collection in game, you'll need to start up Fortnite via the Epic Games Launcher on PC.
Then, head to the Item Shop and claim it - that should allow you to use it across Fortnite on all platforms.
Do note though, you can only claim the Street Shadows Challenge Pack from today, May 20, until 11am ET/4pm BST on June 17.
Can You Buy It in Game?
The FAQ for the cosmetics bundle does confirm that missing out now does not mean you miss out forever.
It should come to the Item Shop at a later date for an as yet unconfirmed amount of V-Bucks.
We'd recommend claiming it now, whether you want to use it or not, so that you're not wasting money down the line if you change your mind about wanting the pack.
While you're there, why not check out what else is included in the Epic Mega Sale, since there are some good deals for anyone who plays via the publisher's launcher on PC.