Foldable design with dual function This backpack has an innovative foldable design that can easily change shape. When unfolded, it acts as a spacious everyday backpack, and when not in use, it can be folded to the size of a toiletry bag, making it easy to store and carry. Can be carried both on the back and in the hand, meeting different needs for different occasions. Ultra-light material that reduces the burden The backpack weighs about 160 grams, which is about half of a traditional travel backpack, greatly reducing the carrying burden. Suitable for both men and women, and is ideal for all kinds of daily activities, providing a light and comfortable user experience. High-quality waterproof material, durable and reliable Made of high-quality 230D polyester with invisible mesh material reinforcement. It has excellent waterproof and wear-resistant properties, effectively protecting your belongings from rain and wear. Perfect for both city commuting and outdoor adventures. Large capacity, adaptable to many scenarios The capacity is adjustable between 20 and 35 liters, making it suitable for outdoor travel, camping, hiking, cycling, school or shopping. The spacious interior makes it easy to pack your daily necessities. Flexible and portable for various uses This backpack can be used as a daily travel backpack or as a practical storage bag. When folded, it is compact and easy to put into another bag or storage space, providing both lightness and functionality.