Aquatic Arts 10 Breather Bags for Shipment or Transportation of Fish, Shrimp, Aquatic Animals (Compare to Kordon Breathing Bag) New technology for aquatic animal transportation, this breathing bag lets oxygen enter and carbon dioxide escape. This means there is NO need to fill with extra air or oxygen. Thicker material and more resistant to tearing and pinholes than other brands. Tired of bags that have poor quality control and thin material that leaks under pressure? Try these bags. These are the same bags that Aquatic Arts uses for all live aquatic animal shipments, even crayfish. More resistant to dorsal spines and invertebrate claws than other breathing bags. Does not require double bagging for most animals, unlike other breathing bags.