The Twitch Prime Pack #2, released on May 9th 2018, is a special set of items released for free to Twitch Prime subscribers who play Fortnite Battle Royale.
It includes the following items:
To get them, you must be a Twitch Prime member. If you have Amazon Prime than you also have Twitch Prime, since Twitch Prime is free to all Amazon Prime subscribers.
How to get
To redeem the items you need to go to this website:
and follow instructions to link your Twitch account to your Epic game account.
Then, the items will appear in your Locker.