Twist action ballpen. The body surface and mechanism of the Biotic Pen are manufactured from 100% renewable raw materials. For the DS3 Biotic Pen “Sand” this includes polyactide (PLA) and wood-plastic composites (WPC). The complete writing instrument (including refill and spring) is up to 80% biodegradable. Please note that bioplastics react more strongly to environmental factors such as heat light pressure and moisture. Complies with the EN 13432 standard for the compostability of bioplastics.