Ultimately, coffee is all about taste, flavor, and aroma. This SGC2K Kraft Coffee Bag comes with a one-way degassing valve to extend the freshness of rich and complex flavors. This stand-up pouch measures 3 3/8" x 2 1/2" x 13" and holds 11-12 oz of coffee, tea, and specialty food items. The one-way degassing valve releases naturally emitted carbon dioxide and trapped air while preventing external air from entering. The one-way degassing valve is located 3 1/2" from the top of the bag. The material is made from 5.2 mil laminated material and offers an excellent aluminum barrier to protect against moisture and air.Recommended Heat Sealer: HS6P on high for around 8 seconds.