"What is a MADBULL Bio-Degradable BB?"
Right after MADBULL got Bio-gradable ASTM D6954 certificate for P-LIFE Bio BB, they decided to release the other kind of Bio BB which is very popular in Europe and some parts of USA. That is 100% Polylactic Acid (PLA) BBs.

"What is PLA?"
IT'S MADE FROM CORN Polylactic Acid (PLA) is a biodegrable polyester derived from renewable resources such as corn.
It is currently used in a wide range of applications ranging from disposable cups to biomedical applications.
It is an earth friendly alternative to using petrochemical-derived products.
Totally Recycle Product (Pack in Milk Carton paper packaging) Planet Friendly Airsoft BB These BIO-BBs are water-soluble after being soaked in rain & heated by sun Will turn into food grade Powder & absorbed by soil Precision BB, all have a standard size of 5.95 +/- 0.01mm with precision lapping and polishing processes Suitable for all Airsoft Gun - AEG, Pistol, Rifle....etc that use 6mm BB Quality of BB is important for prolonging the life of your Airsoft Gun *NEVER RE-USE BB as High Quality BB is very sensitive to dirty & mud