You will get free when you create a Fortnite account.
The Default Glider is the most common glider in the game.
Most of us learned how to soar through the air using this glider. With its metallic base and light blue canvas with a patch, it is clear this glider has survived a few battles already. Whether you love minimalism or do not have any options just yet, this is your glider.
This common glider skin is not a part of any set.
How to get it
By installing Fortnite, registering and logging in you will have this glider as your first and only option.
Default Glider high-quality PNG images with transparent background to use them as you wish (YouTube thumbnails, skin concept and so on).
Used in-game to Shop and Locker, credit to Epic Games.