Abstract: In combination with a bicycle having a frame, and having a seat mounted on a seat post which is removably and adjustably connected to the frame, the combination of a seat covering, for keeping the seat clean and dry when not in use, and a receptacle for the seat covering having the covering received bodily therein when not in use. The seat covering is formed of flexible non-elastic water proof sheet material and shaped to conform to the contour of the seat, and has elastic means acting on the material of the covering to gather it, along its peripheral edge, to secure the covering in engagement with the seat. The material of the covering is such that it may be rolled or folded, for storage in small space. The receptacle consists of a cylindrical container, open at one end and having a screw cap therefor, which is rigidly and removably connected to the bicycle structure and positioned rearwardly of the seat and below it, with its open end facing rearwardly for convenient access to its interior.