Blue freezer bags. Blue is the recommended color for freezing food. Get optimal freezing. With the food brand-square you can easily identify your frozen foods. Use a permanent marker to write the name of the food on the bag. Keep your freezer organized. Made with reinforced material that makes them extra resistant. Your food will be safe. With ZIP hermetic closure to open and close the bags easily and without losing the hermetic seal. Each pack includes 20 freezer bags of 17 x 25 cm. Available in two sizes.