The SugarWrap Eco Zip Lock Sandwich Bags Large are a resealable food storage solution made with Natural Sugarcane BIO-PE renewable material, offering the same functional durability as regular petro-based plastics whilst being completely sustainable. Ideal for storing sandwiches, vegetables, fruit, baked goods, cooked food and leftovers, these thick, durable bags help protect food from freezer burn and keep food fresh in and out of the fridge. Microwaveable and freezable (when defrosting and reheating, keep slightly open to vent). USDA Certified biobased and packaged in cardboard.