True Bio, exceeds standard “Bio inert” standard – environmentally friendly – breaks down over time with a mixture of degradable processes (heat/sunlight/moisture/pressure) – often required by outdoor fields, games, and milsim-type events. The player’s selection of weight can be determined by factoring combinations of play style, airsoft gun (power/upgrades), game environment (CQB/Milsim/outdoor), and local rule sets.