We developed the J-Series by recreating the old steel spring saddles and the result was amazing! Carbon springs (one longitudinal and one transverse) can absorb much of the vibration resulting from uneven ground that is normally supported by the rider’s joints. The central opening is specially designed to ensure the total absence of pressure on the prostate region. This is the only “spring” saddle in the world, under 100g. Orthopedically certified!