FoodSaver 8" X 20' Heat-Seal Rolls - 1 Box of 2 Rolls Multi-ply material prevents freezer burn^Specially designed channels block oxygen and moisture to maximize air removal^Simmer and microwave safe^Compatible with all foodsaver &amp; seal-a-meal vacuum sealer machines^Keep foods fresh up to 5X longer with the FoodSaver&reg; 8" Heat-Seal Roll