With adjustable bicycle rear rack clip, it is suitable for most models as a bike pannier bag. With hidden should straps and laptop sleeve, it can be used as a commuter laptop backpack. Equipped with single shoulder strap and shoulder strap cushion, it can be used as shoulder bag. Two movable buckles on the back of the bag help you adjust the bag to the right position according to your bike rear rack, there is a gray clip on the movable buckle, which can be removed according to the size of the rear rack of the bicycle, so it is suitable for most bicycle rear rack. The bottom fixing belt can be firmly tied to the bicycle rear rack. Made of high density Tarpaulin Vinyl which ensure you can use this bag freely on rainy day or wet weather without worrying about your items getting wet inside the bag or scratched. The fixing plate on the back of the bag effectively prevents the bag from getting into the bike spokes.