How do you get a Minecraft cape?

I've been Minecraft several times but I still have no idea how to wear such a cape, someone knows how to get one

I think there were times at such events but you can only get them through mods in Vanilla

Do you mean elytra Do you get any idea like in survival or in creative mode.

By the way, you can glide with Elytren and if you also fire fireworks while you glide, you can fly, and even better than in creative mode with the spacebar!

They are from Optifine just go to the https://optifine.net/...C8-N1lJo-w page

(but costs money)

Are from optifine. However, they cost about 5-10 euro