Ziploc storage bags feature double zipper seals to lock in freshness and protect foods from drying out. Each individual bag double-wraps your food with 1.75 mil thickness. Design combines a protective outer layer with a unique textured InnerCling layer that clings to food, keeping air out, reducing freezer burn and helping to preserve the original flavor. Use write-on labels for easy identification. Kosher certified, microwavable bags hold one quart and come in a convenient self-dispensing carton. Bags are FDA approved for food use.