✅【Lightweight, Tear-Resistant, and Packed with Features】Lightweight: 163g Size: (approx.) 19cm (height) * 10cm (width) * 9cm (thickness) With a spacious interior, it can be used as an eco-bag for shopping, offering convenience and lightness. Adjustable shoulder strap, allowing both a 130cm child and a 175cm adult to adjust the strap for carrying. The main compartment has a large double zipper for easy access, an inner pocket for storing small items, 1 front pocket, 2 side pockets that can hold 500ml PET bottles, and 1 included storage bag. ✅【Outdoor Backpack】The foldable backpack has water-repellent fabric on the back pocket; if it gets wet, simply wipe it with a towel, and it will return to its original state in a few seconds to a few minutes. (※Not waterproof in heavy rain) Available in 4 colors, making business trips and travel enjoyable. It's foldable for easy storage anytime. ✅【Enhanced Comfort, Improved Breathability and Fit】Packed with many user-friendly features in both the main body and the storage pouch. It's compact, making it easy to carry around. When traveling, you can put a foldable backpack in your bag to accommodate souvenirs and extra luggage on the way back. The application of the back tape and buckles allows for attachment in various places. Comfortable mesh shoulder straps that prevent stuffiness even after carrying for long periods; can be attached to pant belt loops or the handles of other bags. ✅【Backpack for All Ages and Genders, Unisex】Safe for cycling, motorcycling, and long-term use. Perfect for daily school commutes, work commutes, sports events, camping, hiking, travel, and outdoor activities. Used only once for a short period.