These are ballpoint pens with a medium point and blue ink. They are known for their long-lasting ink supply, which is why they are called "Xtra Life."

Bic Cristal Xtra Life pens are a popular choice for everyday writing tasks, such as taking notes, signing documents, and filling out forms. They are also relatively inexpensive, making them a good value for the money.

Here are some other popular blue pens:

• Pilot G2: These gel pens are known for their smooth writing experience and vibrant ink colors.
• Pentel EnerGel: These gel pens are also known for their smooth writing experience, but they have a slightly thinner line than the Pilot G2.
• Uni-ball Signo 207: These gel pens have a fine point tip, making them ideal for precise writing.
• Sharpie S-Gel: These gel pens are known for their bold lines and quick-drying ink.