Onedayshop Multi Function Mountain Road Bicycle Bike Cycling Sport Waterproof 7L Rear Seat Bag Pannier Trunk Bag Bicycle Accessories Large Capacity-7LWith a main pocket, 3 insert pockets and a bottle pocket. Can be used to plant luggage, outdoor products, such as water bottles, maps, food, etc. Easy to InstallWith velcro quick release design, simple installation and removal. Very strong and durable. The saet bag is suitable for all kinds of bike models. Safe DesignBoth sides of bags have reflective tape, this make it safer to riding at night. Meanwhile it uses waterproof polyester material. Multiple Functions-- It can also be used as a regular bag after parking the bike. One can carry it by hand or shoulder due to its multiple functionalities ServiceOur seat bags are checked carefully before shipped. If you have any other problems. pls feel free to contact us, we will reply ASAP. My store also have any other bike accessories, hope can help you in some ways.