Sharpie Highlighters in tank style feature Smear Guard ink technology that is specially formulated to resist smearing of many pen and marker inks. Quick-drying, odorless ink is certified AP nontoxic. Easy-gliding chisel tip delivers a smooth highlighting experience. The chisel tip lets you highlight both wide and narrow lines of text. Bright see-through colors increase information retrieval efficiency so the highlighter is great for highlighting or underlining. Dependable, long-lasting highlighter also offers a long write-life.