Adapt and evolve your ideas with ease using EXPO Wet-Erase Markers. These EXPO markers are permanent until you want it gone. The smudge-free ink stays put when dry, but with water-activated erasing technology, they wipe clean with water. These ultra fine-tip markers are great for precision, clarity and for adding details and embellishments to your calendar or small spaces. Markers are effective on glass, whiteboards and other non-porous surfaces.