Designed for coffee beans and other applications the pouch's vent channels automatically seal to prevent oxygen from entering the pouch. Many types of film can be used for the pouch including multilayers high-barrier films nylon or LDPE. A zipper from Minigrip/Zip-Pak (Manteno IL) offers resealability. Pouch sizes range from 6 oz to 5 lb. Printing via line or other processes is available in up to 8 colors.