This double-sided highlighter features fast-drying, smudge-resistant ink and a clever tip design that ensures your highlights are always clean and straight. The Kire-Na's tip features a flexible, sponge-like tip surrounded by a two-pronged clear plastic guide. The design also minimizes the amount of ink pooling at the end of each highlight. A bullet tip on the opposite end is perfect for underlining, circling, and writing margin notes.