Ziploc freezer bags feature double zipper seals to lock in freshness and protect foods from drying out and getting freezer burn. Each individual bag double-wraps your food with 2.7 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 and date-coding. One gallon bags are Kosher certified and microwavable. Bags come in a convenient, self-dispensing carton.