1. Expansion bag body, effective capacity expansion is 12.98L, daily capacity is 26L, capacity expansion is 39L (normal model does not have this function) 2. Highly elastic honeycomb back pad, comfortable and breathable without squeezing the back 3. Water-repellent fabric to prevent water from soaking items 4. Multi-layer large space, can accommodate 5-7 days of travel clothes 5. External charging interface, the mobile phone can continue to use the battery 6. The magic cloak and the backpack are combined into one design, which can protect against rain and wind, and can be detached as a separate raincoat (only the raincoat has this function) 7. Fabric: Oxford spinning 8. Dimensions: 46 x 18/28 x 30 cm 9. Weight: 1.08kg 10. Shoulder strap: length 45-50 cm
