4-D hair color sounds like it'd be another holographic hair trend, but it's actually the key to super-realistic, gorgeous highlights.

Knowing Your Hair Porosity Is the Key to Healthy Hair — Here's How to Find Yours By Danielle Jackson Updated on Sep 25, 2024 at 6:10 PM Getty | wsfurlan ...

Type-four hair is the kinkiest, coarsest, and driest of all the hair types. Because of the many twists and turns of this texture type, it is very hard to get moisture to the scalp and maintain shine.