Even more comfort and improved pressure distribution for the soft tissue areas. Compared to the SMC3s softer structure and additional volume in the seat cushion. Optimal pressure relief in the perineum area by 9 mm deep relief channel. An extra large seat effectively reduces pressure peaks and optimally distributes the pressure on the sit bones and pubic bones. Features a flat seat for dynamic sitting in different positions without tilting effects unlike step saddles. SMC4 Comp Gel and SMC4 Sport Gel with gel pads for maximum comfort.