1. Unique design: This cooler bag features a buckle and top design that can be freely adjusted to meet your needs. It is the best choice for daily insulation/refrigeration and carrying food and drinks. You can also use it as a picnic cooler bag, a work bag, a mini schoolbag, or even a small fitness bag to store protein shakes, towels, and some snacks after exercise! 2. Insulated lunch bag: The exterior is made of durable Oxford cloth, and the interior uses加厚 food-grade aluminum foil to ensure good insulation effect, keeping food fresh and insulated/cooled for hours. 3. Top-quality: The lunch bag is made of sturdy Oxford cloth and aluminum foil. The interior is leak-proof, waterproof, wear-resistant, and stain-resistant. The waterproof interior and the easy-to-clean inner sealed seams prevent leakage. All these designs make your bag durable, sturdy, and provide long-lasting value. 4. Large capacity: This reusable lunch bag measures 23 * 17 * 23cm. You can roll up the top up and down according to your needs. The length of the shoulder strap is adjustable (minimum: 29 cm, maximum: 57 cm). There is a zippered pocket on the back for coins, napkins, forks, wallets or cards, and mobile phones. 5. Convenient to carry: This insulated bag is lightweight and portable, making it easy to carry to school, workplaces, picnics, camping, fishing, etc. It can be used as a lunch bag, a picnic bag, or a freezer bag. With its fashionable design, it is an ideal gift for ladies, men, and students on birthdays, Christmas, and Thanksgiving. 注：原文中“内部使用加厚食品级铝箔”里的“加厚”在英文中未翻译，推测可能是“thickened” ，你可根据实际情况修改。