Face-Framing Layers. Bangs will draw attention to the fact that your hair is thin. Instead of bangs, get face-framing layers that add depth and width to your hair. Bonus points if you curl them away from your face for an even more thickening effect. Highlights and Lowlights. Subtle highlights will add depth to thin hair, but don’t go too light. Be sure to keep lowlights and darker roots for a base. Mixed-in highlights create the allusion of more layers, therefore more hair.