| 摘要 |
A backpack having a longitudinal axis and a perpendicular transverse axis includes a top end, a bottom end, and a body portion extending between the top end and the bottom end. The backpack also includes an expansion panel attached to each of the top end, the bottom end, and the body portion. The expansion panel is longitudinally-oriented and is configured to expand in a transverse direction between a collapsed configuration and an expanded configuration. |
