With zip lock and tear mouth design, the stand-up bags are good for packing, and storing foods, like nut-fruit, candy, cookies, tea leaves, dried foods, snacks, etc. Heat Sealing Supported: Can be sealed by a heat healing machine, convenient and provide dual seal protection to keep food fresh. Notch & Zip Lock: The notch design is top opening, easy to open the bag. Zipper seal, reusable. Transparent window, you can tell what's inside. At the bottom of self-standing, one can stand to save. PE inner membrane, waterproof, moisture, insects.Strong Matte Window: Each food storage pouch has a matte window, you can see the contents and do not need to open it. The material and structure are also not easy to break. Easy to Use: Thanks to the zipper on the resealable Kraft bags, you can use as little or as much of whatever is inside without compromising on freshness. Use the bags to carry food camping and hiking, or as lunch bags for taking treats to work or school.