These Shield N Seal textured vacuum bags are perfect for long term storage or sous vide cooking. The 5 mil thick BPA Free material holds a vacuum for a long time, and the "flavorcomb channels" make it compatable with ShieldNSeal sealers, as well as other clamp / FoodSaver style vacuum sealing machines of appropriate sizes such as Cabela's, Shield N Seal, Countermate, VacMaster, Anova, Nesco, etc. This is for 4 boxes of 50 vacuum seal pouches (15" x 20"). They sport the Shield N Seal logo along with a small area to write labels for your convenience.