Bio-Write Retractable Gel Pens are made from 35 percent bio-based and biodegradable corn-based bio-resin and 27 percent pre-consumer recycled plastic by pen weight. Bio-based pen reduces use of petroleum and reduces chemical residue in landfills. Medium point delivers bold vivid lines with exceptionally smooth ink flow. Gel ink is acid-free to help preserve documents. Grip color indicates the ink color. Translucent barrel allows monitoring of the ink supply. Latex-free rubber grip protects against allergic reactions and provides added writing comfort. Gel pen is refillable. Product packaging contains 100 percent recycled material and 35 percent post-consumer material.