Constructed of BPA-free multi-layer material, FoodSaver bags are safe for sous vide cooking and are designed to withstand boiling temperaturesVacuum sealing your ingredients allows heat to better transmit to your food and ensures that packets stay submerged during the sous vide water bathMulti-ply material locks in freshness, prevents freezer burn, and can go straight from the freezer to a sous vide bath with no separate defrosting requiredSpecially designed channels block oxygen and moisture to maximize air removal, keeping food fresh up to 5x longer than non-vacuum storage methodsAvailable in a variety of sizes, FoodSaver bags are freezer-, simmer-, and microwave-safe, making them a great option for preserving and preparing meats, seafood, vegetables, and more