Compatibility: Fits most bike racks, including those for city, mountain, road, electric, and hybrid bikes, etc. Please confirm your bike rack size before purchasing. Compatible: Support for Width Less Than 6 inches Bike Rack Rain Cover & Water Resistant: An added rain cover to upgrade its water resistant capabilities. This cycling pannier bag is made of 600D Oxford fabric with water resistant PVC Layer. Effectively stay away from the humid climate even when caught in a sudden downpour Large 34L Capacity: This Kemimoto bike bag has been upgraded to a large capacity of 17L per bag, and the total capacity of 2 bags is UP to 34L. Includes 2 main compartments for each bag. Plus the 2 pockets on the outside, ideal storage for daily essentials, biking gear, cycling accessories. Ideal for grocery, commuting, and outdoor trips Double System Fasteners: There are 6 strong straps. The front and rear straps attached to rack perfectly. With extra 2 side hooks, you won’t worry this bike rack bag bouncing around while riding Obtuse Angle Design: Obtuse angle design for two side bags ensures enough pedaling space. Wouldn't hit heel while riding. Providing you with a comfortable riding experience