Dr. Batra’s Instant Hair Thickener is non-toxic and is designed from 100% natural hair building fiber. These fibers adhere to your hair and scalp giving your thin hair an instant dense appearance. To match your natural hair color it comes in shades of Black and Dark Brown. Instant Hair Thickener provides a hassle-free application and is the perfect solution to natural-looking fuller hair. It is resistant to rain, wind, and perspiration and lasts until the next hair wash. With Dr. Batra’s Instant Hair Thickener say goodbye to embarrassing visible scalp patches and regain fuller-looking hair.