Made from PE (Polyethylene),BPA free,no toxic,safe to use. Can be reusable,refrigerated and heat resistant (under 110℃/230℉). Pack of 18 pieces food bags in three sizes,Large*5(24.5cm/9.7×14.5cm/5.7),Medium*6(19.5cm/7.7×12cm/4.7),Small bags*7(15cm/5.9×10cm/3.9). Zipper airtight designed,leak proof,great for food classification saver, and storage like snacks,candies,fruits,crackers,cookies,sandwich seasoning and so on. Portable and easy to transport,not only for storage foods on kitchen or freezer,but also can be carry food for outdoor,li