Now going green in Airsoft, no longer means wearing camouflage. The New Environment Friendly Airsoft BB for Pro Games. Finally you can go green while maintaining accuracy and consistency in your Airsoft gun. Manufactured to exact dimensions within a +/-0.01mm tolerance. This environment friendly BB will shoot tight groups at long distances. Nontoxic and safe for people and environment tested according to EU and US regulations. The BB's contain PLA, a thermoplastic polyester derived from renewable resources, such as corn starch, or sugarcanes. PLA biodegrades in the presence of primarily moisture and oxygen.