1. Material: Oxford cloth, carbon fiber pattern
2. The high-brightness reflective strips on both sides are designed to make it safer to ride at night
3. Detachable hollow mesh strap, thickened foam honeycomb back pad, breathable and comfortable, reduce back pressure
4. Expansion warehouse design, flexible and retractable, can store helmets
5. Elastic storage rope design, can store soft items such as external gloves and clothes
6. Thickened diving cloth portable design, soft and comfortable, do not hold hands
7. Dimensions before expansion: 29 x 10 x 43 cm
8. Dimensions after expansion: 29 x 30 x 43 cm
9. Weight: about 1.3kg