The Fizik Terra Argo X3 saddle is a specialized model designed by the manufacturer specifically for gravel bikes. It features a short nose and a shape that allows a stable riding position with optimal weight distribution of the rider. Thanks to the short nose, the rider can position themselves closer to the handlebars without risking excessive pressure on the soft tissues in the groin area. To ensure comfort in the most sensitive areas, the designers included a characteristic cutout in the center of the saddle.

Additionally, the sides of the Fizik Terra Argo X3 use WingFlex technology – the edges of the saddle adapt to the movement of the rider's legs. The saddle construction is made of nylon reinforced with carbon fibers, making it resistant to mechanical damage and adverse weather conditions. This construction, combined with the internal padding around the sit bones, provides good shock absorption from the terrain – which is crucial for gravel riding. The model features the Mobius Rail system (with a closed loop), which enhances the saddle's responsiveness. In this version, the rails are hollow inside and made from a Kium alloy, offering a high strength-to-weight ratio.