Abstract: The invention relates to a bicycle seat cover assembly having a seat cover with an exterior trim member extending about its periphery, front and rear under flap members supported from the exterior trim member and adapted to pass underneath the respective ends of a bicycle seat for securing the set cover assembly thereto, and an adjusting strap disposed intermediate to the front and rear under flap members for adjusting and tightening the securing action.According to the invention the rear under flap member is of generally crescent-shaped configuration but cut off at its forward corners, and the missing corner are then replaced with a pair of essentially triangular, highly elastic members. These members make it easier to install or remove the seat cover assembly, and also increase its useful life.

Abstract: A bicycle cushion seat cover with aerodynamic shaped bag is described which provides comfort and support to the bicyclist without chaffing and bruising. The bicycle cushion seat cover with aerodynamic shaped bag weighs less than 9 ounces and is composed of a foam with a density of 1.8 to 2.8 lbs. per cubic foot and an impression force deflection of between 75 and 95, a vinyl cover having a density of 2 ounces per square foot, 2 underside flaps and an underside lining with a density of 2 ounces per square yard which provides firm attachment means, and an aerodynamic shaped bag with maximum dimensions less than those of the maximum back dimensions of the bicycle cushion seat cover such that the bag creates minimal aerodynamic drag.