Tactical Force Bio BBs are 0.2 gram softair BBs for airsoft guns that are biodegradable. These airsoft BBs are stable in the atmosphere, but biological decomposition commences when they`re exposed to bacteria or fungi, and moisture. Living microorganisms transform the biodegradable resin into carbon dioxide and water. The polymers of these air soft Bio BBs completely decompose in normal composting conditions without any harmful by-products, and are harmless to the environment at every stage of the decomposition process.