Waterproof saddle bag for road bike rear bagFeatures: Easy to install. Suitable for all types of saddles. Special anti slip zipper design External tail light design The rear end is thoughtfully designed with a plug in system, which can attract pedestrians or vehicles during night riding to protect the safety of the rider. Intimate design Multi layer classified placement, daily items and maintenance tools can be classified and placed, which is more convenient and quick to take. size: 18*9. 2*10.