Food Grade Material Made of food grade PEVA material and passed certified test to ensures the reusable food storage bags are BPA free. No silicone or plastic smell, durability, and is not easily damaged. This ensures 100% safety to your health and allows zero flavor transfer. Leakproof & Easy Seal Our reusable food storage bags adopts a zip lock style sealing design. Waterproof, leak-proof is easy to open and close, dustproof with strong sealing performance, keeping the food fresh and not easy to mix cross odors. Perfect for storing and preserving food. Expandable Bottom These freezer bags feature an innovative widened bottomdesign, which increases the capacity of the food bag, makes it easier to stand when the bag is full, will prevent accidents, making the refrigerator storage neater. Easy to Label The resealable zip lock bag is designed with a writeable area, making it easy to record dates, food names, and other information, by using a non permanent marker, you can quickly identify item information, easily separate kidslunch/leftovers/snacks/fruits. Freezer Safe & Dishwasher Safe The freezer bags can lock out freezer burn while keeping food fresh, perfect for freezing meat, chicken, fish, fruits, vegetables and as produce bags. Upgraded material makes it top rack dishwasher safe under 60/140F. Recommend for hand wash and air dry. Not microwave friendly.