Review on Hethrone Coloring Markers: 36 Dual Brush & Fine Tip Set for Adult Coloring, Calligraphy, Drawing & Bullet Journaling by Shannon Brown

I don't know why it says "highlighter" in the title. That's not what they're here for. That being said, be aware that there are no black marks. They "bleed" like any wet ink. The thinner the paper, the more it shows on the back of the sheet. DO NOT use them in your Bible. If you put the marker in one place on the paper, the ink spreads, but rather slowly. They are great for adult coloring books (where there is one picture per page and nothing on the back of the pages) or original illustrations. They are MARKERS and should be treated as such.