The only thing you need to do is to buy the “invisibobble” elastic band! These unique hair rings are traceless, better for your hair, and prevent headaches! They also work well for putting your hair up into a messy bun without the crazy hair look if you want to take it down. They look like telephone cord. The twists create an uneven pressure on the hair that doesn’t cause that obvious dent. They are super comfortable to wear and they don’t cause dent even after hours of wearing it. It’s also easy to remove without causing any tangles. You can see the pictures below and do not think twice just try this tricks and you will notice the changes immediately. I love this really. Enjoy
Source: http://sciencere.com/2015/09/20/the-most-useful-trick-that-every-girls-will-love-how-to-avoid-the-ponytail-dent/