The Grown Up Half Up-Half-Down:

Step 1:

Pull your hair into a half-up half-down style, leaving a few face-framing pieces out, and then secure them with a hair-colored or clear elastic.
Now, Take hold of the bottom part of the pony.

Step 2:

Create a little hole above the elastic with your finger and loop the pony through it and you’re done.

More on: https://sobotips.wordpress.com/2017/07/23/2-hairstyles-you-can-do-in-literally-just-10-seconds/