Default Glider is a Common Fortnite Glider.
This is the default glider you will use if you don't have one equipped. This was updated to a fancier version when the Chapter 2: Season 1 Battle Pass was released! It seems likely that they will be updating the default cosmetics every new chapter.
Default Glider PNG
You can find PNG images of Default Glider below! Click to enlarge the image.