As its name implies, the uni-ball PowerTank RT Ballpoint Pen is equipped to perform in extreme conditions. With its incredibly fast, free-flowing ink and a rugged design, this all-terrain ballpoint pen delivers smooth, clean writing even on wet surfaces and in cold temperatures. This pen comes with a textured grip that provides comfort and control in the face of punishing weather. The PowerTank RT also features exclusive uni Super Ink, a pigment-based ink that forms an indelible bond with paper to protect against water, fading, and fraud. These versatile ballpoint pens have a convenient retractable design and are even refillable.