 Television commercials for the product claim it will keep fruits and vegetables fresh for up to 30 days by absorbing ethylene gas.Ethylene perpetuates the ripening process of produce and plant material coming from a root system, and thus the bags' ethylene absorption is intended to slow the ripening (and thus the decaying) process and preserve the produce's shelf life.The product's packaging acknowledges that certain vegetables and fruits are preserved better in the bags than others (strawberries, for example, are only advertised to last about nine days in a Green Bag compared to over three weeks for cabbage or carrots).