Smear Guard technology. Won't smear most inks! Convenient cap clip attaches to bags, backpacks or 3-ring binders. Smear Guard ink - specially formulated so it won't smear most inks. And resists smearing on many leading inkjet printers. Let ink dry before highlighting. Durable and versatile chisel tip - great for highlighting and underlining. Conforms to ASTM D-4236. Nontoxic. Made in China.