FoodSaver zer Bags, 20-Pack are crafted from a unique 3-ply FDA- material designed to keep your food fresh and protected. Featuring an outer nylon layer for added strength and a moisture and oxygen barrier, these bags effectively prevent zer burn, ensuring your food maintains its quality. These heavy-duty bags are versatile and safe for use in the microwave, boiling water, and zer. They are also dishwasher safe, allowing for easy reuse and resealing, making them an eco-friendly and convenient choice for food storage. The quart size measures 4 inches wide by 8.38 inches long and comes in a resealable box of 20 bags, for portioning and preserving a variety of foods. Model Number: FSFSBF0216-NP