🧳【HIGH QUALITY MATERIALS】- Made of high-density nylon fabric, it has excellent wear resistance, scratch resistance, and water resistance. The inner bottom of the bike luggage bag is filled with thick foam pads, the stable structure makes it difficult to deform. Even if there is nothing inside, it will not collapse to maintain its shape and protect your items.The pockets on both sides and the water bottle bag are designed with reflective strips to increase visibility and safety at night. 🧳【SUPER LARGE CAPACITY】- The capacity of the newly upgraded bicycle rear seat storage bag can be expanded to 35L. The main compartment can store the main cycling accessories, such as cycling clothes, shoes, pumps, bike locks, sunglasses, gloves, etc. The foldable pockets on both sides can accommodate other sundries. And some internal pockets to help you organize some small items. The bike rear seat bag with large capacity is the ideal choice for most cycling enthusiasts. 🧳【DURABLE AND ANTI SHOCK】- Our bicycle pannier bag is made of high-density nylon fabric with excellent abrasion and water resistance. There is a thick cushioning foam at the bottom of the bag, so it can protect your items from moisture and damage. Note: Please do not put the bicycle rear seat bag in the heavy rain for a long time. 🧳【EASY TO INSTALL 】- There are 2 Velcro straps on the front and 2 long buckle straps on the bottom, which pass through the rack and the fixing buckle, which can be firmly fixed on the rack without shifting. The velcro and buckle straps design can be easily and quickly installed on the rear seat frame of the bicycle. Please Note: be sure to pull in the velcro and buckle, otherwise it is easy to be shaken and fall when you are on an uneven road! 🧳【MULTIFUNCTION BICYCLE REAR RACK STORAGE BAG】- In addition to being used as a bike rear rack pannier bag, it can also be used as a handbags and shoulder bags. It is very suitable for outdoor activities, such as cycling, climbing, camping, traveling, hiking, fishing, and also suitable for daily use, such as commuting , go to school, etc. For outdoor enthusiasts or daily commuting, this is a good choice !