Hard Shell Design: TPU Shell Material. Fastening and Wear-resistant Hard Yet Flexible Quality Waterproof Material Meet Emergency Needs: The inner layer of PVC strengthens the coverage. Prevents Daily Rain From Entering 13-25L Expandable Design Large Capacity Pannier Bag: Put on what you, want to bring, and explore the meaning of riding together Classification Storage Built-In Compartment: There are classified storage mesh pockets inside. Convenient for storing small items Tail Reflective Design Riding Escort: Riding at night, safety is very important, the reflective design on the side protects the safety of cyclists at night Portable: Shoulder strap design multifunctional storage bag. The shortest strap: 90cm, longest: about 120cm Specifications: Brand: WEST BIKING Material: polymer waterproof cloth and PVC and TPU hard shell Minimum capacity: 13L Maximum capacity: 25L Weight: about 980g Function: Pannier bag, shoulder bag, handbag