Super Capacity: Super capacity, meets all you need. Large capacity for storing many items such as mini tire repair tools, phone, and so on. Hard Shell: The surface has a certain degree of hardness to keep the seat bag from deforming. Buckle Install: The quick-release clip of the cycling saddle bag provides excellent stability and ensures the bike bag can be easier removed and install. Safe Design: There is a taillight hook on the back of the bicycle storage bag for the hanging taillight. ?Large Capacity?: Large capacity, meets all you cycling need. Large capacity for store many items such as small repair tools, taillight, gloves, phones, power bank and so on. Sub-warehouse design makes the storage space larger. Inside with small mesh and spring belt for placing small things like credit card or small tools. ?Hard Shell Surface?: Made of high quality EVA material, the surface of the saddle bag feels textured and lustrous. You can really feel the material of the saddle bag and general product is different. Moreover, smooth surface makes the bike seat bag easy to clean. ?Buckle Install?: The quick release clip of the cycling saddle bag not only provides excellent stability but also ensure the bike bag can be removed and install in 3 seconds. It's durable, not as easy to break as straps. Incorrect installation may cause the screws to fall out. Refer to the installation method in picture description. ?Safe Design?: There is a taillight hook on the back of the bicycle storage bag for hanging taillight (TAILLIGHT NOT INCLUDED). With silver reflective logo on the back, make you be more safer on night. The unique design will escort your night riding. ?Easy to Install?: Stable sitting bow bracket, there are two screws and one hexagon wrench to help install the bicycle seat bag. Buckle design, allowing the bag quickly install and release in a few seconds. Magic straps help fixed the bag prevent it from shaking. (Note: The bike saddle bag is suitable for the seat with rail width ? 55mm and the rail has to have ? 20mm of straight frame, takes 130mm from the bike seat to the tire and can’t be installed to seat rail with obstruction.)