The original highlighter, with vibrant read-through colors and a molded chisel tip to highlight or underline. Durable plastic tip for smooth highlighting - won't fray or mush. Improved formula allows you to leave the cap off for up to one week and still highlight. Quick-drying, non-toxic ink. ACMI certified conforms to ASTM D 4236. Assorted 4Ct colors include: Light Blue, Light Green, Light pink, and Yellow.