Fantastic gliding gel pen. Easy click action and refillable in either the blue or black ink! There is also a recycled version of this pen called the B2P (Bottle 2 Pen)!
From the manufacturer:
These retractable gel pens feature a contoured rubber grip for writing comfort. The ink is smear-proof and acid-free, and the dynamic gel ink formula provides for smooth writing. Refills are available in a package of two.