Foodsaver Unique Multi-Layer Construction creates an air-tight barrier around foods. Specially designed channels allow for the complete removal of air.Cut your sealing time in half - seal two bags at one time.Customizable - Make bags of any lengthGreat for portion control - seal individual portionsResists Punctures and tearingLocks in freshness and flavorSafe for Microwave, Freezer, refrigerator and simmering.