Abstract: The invention includes a bicycle saddle whose seating surface is made of a stretched membrane, where the membrane is stretched into a vaulted shape from the nose extending at least partially through the rider's crotch toward the cantle at the rear of the seat. The invention includes a ventilation path through the seating surface to the rider. The invention further includes at least one carrier member acting upon the membrane to create, at least partly, the vaulted shape, and an attachment of at least part of a perimeter of the membrane to at least one of the carrier members. The attachment further provides the vaulted shape to the membrane and/or a tension to the membrane. The invention also further includes a saddle undercarriage attached to at least one of the carrier members providing at least part of the tension to the membrane, whenever the saddle undercarriage flexes. The saddle undercarriage is further comprised of a means for mounting to a seat post.