1. Large capacity, convenient travel 2. Top with handle, external buckle 3. Breathable and thick shoulder straps, reduce the weight, and the length can be adjusted 4. Two-way opening and closing zipper, smooth and not easy to get stuck 5. There is a trolley strap on the back, which can be used with a trolley case 6. There are pockets on both sides, which can hold water cups, umbrellas, etc. 7. Material: oxford cloth, polyester 8. Applicable gender: male 9. Weight: about 700g 10. Size: about 36 x 17 x 46cm