Green is the antibacterial filter of tea polyphenols, which can inhibit the breeding of bacteria, effectively resist bacteria and care for health. The black one is formaldehyde buster net, which is specially used to treat volatile chemical pollution gases that are easy to produce in indoor decoration and lead to VOC. It can effectively adsorb and decompose harmful indoor gases into harmless CO2.
PS: It's packed left and right.
If you have any questions, American companies are welcome to ask questions. I wish you a smooth work and a happy life!