The Zebra Airfit Rollerball pen features a comfortable air-cushioned rubber grip. This ergonomic design can effectively reduce strain and tiredness on your fingers after long time writing. Also, the slightly oversized body shape and clear rubber grip makes the outlook of this pen cute as well as stylish. The fine 0.5mm nib is one of the most popular size for any type of writing. In addition, its Surari emulsion gel ink features smoothness, fast dry as well as water resistance. It is definitely a good choice for long-time writers.