A waterproof bag with a magnetic buckle and Q.C.R. A one-shoulder inner waterproof bag from the AQA DRY series that boasts high waterproofness with a roll-down opening. The margin that allows you to confidently deal with unexpected sudden changes in weather creates a comfortable riding experience. The symmetrical design allows for right-handed or left-handed use, making it suitable for any user, and the reinforced front panel with a mesh pocket and large zipper pocket (non-waterproof) can be adjusted with the tension belt on the side, without compromising the silhouette. Increases the stability of the bag as the load increases or decreases. The newly adopted magnetic buckle allows for one-handed attachment and detachment, and the shoulder strap is equipped with a Q.C.R system that instantly loosens by pulling the D-ring and tightens by pulling the end of the belt, freeing you from the hassle of opening and closing the bag. In addition, there is a cross belt that firmly holds shoulder bags that tend to shift when riding, a quick-open ZIP tab that is easy to open and close even with gloves on, a finger loop on the main storage opening, a large D ring, etc. This is a waterproof shoulder bag that incorporates specialized and essential functions.