Made Of Insulated & Safe Material. Insulated Lunch Bag Large Waterproof Adult Lunch Tote Bag For Men or Women.Very sturdy and durable, No smell, tea-resistant, wear-resistant, waterproof and dirt-proof, easy to clean. It can be expandable or foldable based on the size need, save your space of your refrigerator or your backpack, perfect for work use. Widely used in daily life.