Abstract: A flexible protective cover for covering the drive train elements of a bicycle when the bicycle is not being used includes an elongated flexible panel part and a flexible skirt part, the elongated panel part including a generally cross-shaped opening through which the pedal attached to the right side of the crank arm of the bicycle drive train can pass and the skirt part including two generally U-shaped openings which can fit around two different parts of the bicycle. The skirt part also includes two elastic attachment bands which can be connected together to close the two generally U-shaped openings to fixedly attach the flexible protective cover to the bicycle.