1. and These bike bags measure 40 x 18 x 17 cm. The capacity of the bicycle bag is about 10 litres and can be used to store necessary bicycle maintenance tools, clothes, food or other small items. For cycling enthusiasts, this bike bag is a good choice. 2. Material The bike bag is made of tearresistant waterproof PU material, ideal for outdoor use in any weather. In addition, the inner lining of the bicycle pannier rack bag is made of thick environmentally friendly aluminium foil, which has the advantage of good insulation effect and is easy to clean. 3. Shoulder strap and reflective band: The bicycle bag is equipped with an adjustable shoulder strap, which can be used comfortably and practically as a shoulder bag. And this bike bag features reflective straps. When you ride in the dark, this bike bag with reflective straps can provide you with more . 4. Hierarchical Design This bicycle pannier rack bag has a small compartment for map, smartphone, etc. And on the side there is a pocket for a water bottle. The reasonable layer design could provide suitable space for different supplies to quickly find corresponding items.