The outer film of kraft paper bubble bags is paper, so its not water-proof as good as the one made of poly, but the kraft paper bubble bag is more environmentally friendly and the paper appearance is more textured. It are basically available in three colors: yellow, white, and natural brown. The outer layer is easy to write on and can be printed. Compared with traditional packaging boxes and small cartons, kraft paper bubble bags are lighter and can generally save 40% of packaging and mailing costs.