Effective and easy to use, oxygen absorbers create a unique, oxygen-free packaging environment that preserves product freshness and extends shelf life. Irreversibly absorbs oxygen inside a properly sealed package to a level less than .01%. Protects your packaged foods against spoilage, mold growth, color change, rancidity, insect damage, loss of nutritive value and quality. Should be used with mylar barrier bags for long-term food storage. FDA approved. Made in USA.