BioFresh Produce Storage Zipper Bags 2 Packs (24 bags) Our unique Bio-Fresh Modified Atmosphere Packaging system (MAP) absorbs gases such as Ethylene, Ammonia and Hydrogen Sulfide which are the main catalyst gases in the ripening process of fruits and vegetables. By controlling this gas we succeed in slowing down the ripening process. Each pack contains 12 zipper bags size 10" x 11"