Coffee bags come in a wide variety of shapes, styles, colors and materials. Flexible Packaging and the invention of one-way degassing valves has reinvented and revolutionized coffee bag packaging. One-way degassing valves are designed to allow air pressure to exit from inside the package while preventing air from entering. Because freshly roasted coffee beans release carbon dioxide, one-way degassing valves allow roasters to package their products immediately without worry of the coffee bag bursting. The flexibility and benefits of flexible packaging bags with the use of degassing valves make them the perfect choice for coffee bag packaging.