| Color | Grey |
| Item number | LY2415 |
| Brand | Challenge peak |
| Applicable gender | Man |
| Material | Oxford cloth |
| Function | Expansion |
| Style | Youth campus |
| Lining texture | Polyester |
| Pattern | Solid color |
| Popular elements | Sewing thread |
| There are licensable private brands | Is |
| Year and season of launch | Spring 2025 |
| Applicable scenarios | School education |
| Carrying system | Air cushion strap |
| Applicable to school age | University |
| Sales | 17360 |




































