Hang Gliders in Bloxd.io are very similar to Elytras in Minecaft. They can both glide. They are both really fast. Unlike Elytras, you don't need to go to the End City (which currently doesn't even exist in Bloxd.io) to get Hang Gliders, meaning that Hang Gliders are easier to obtain that Elytras, which is one of the reasons why many players like Bloxd.io better than Minecraft.