Sharpie Retractable Highlighter has an easy push button so you can just click and highlight! The safety seal prevents the highlighter from drying out when closed. This highlighter also contains Smearguard ink technology, so it resists smearing even pen and marker ink. The quick drying ink is odorless, AP Certified nontoxic, and comes in 8 bold see-through colors: Berry, Blue, Flourescent Green, Flourescent Pink, Indigo, Orange, Red, and Flourescent Yellow.