Applicable models: Trek 2200. Please check carefully whether this product is suitable for your bike model before purchasing. High quality material: The saddle is filled with high quality sponge, making it softer, more comfortable, and more elastic. Its low elasticity and high ductility help absorb shocks on bumpy roads, reducing impact to the body. Ergonomic design: The seat absorbs shocks and vibrations for a smoother ride. The design is narrow at the front to facilitate leg movement and wide at the back to support sit bones, helping you ride longer with less fatigue. Easy installation: The package includes mounting tools, a water and dust resistant cover, a universal seat adapter, and two reflective arms. It attaches to your bike in about 1 minute. The warning stripe enhances safety during night riding. Use scenarios: Ideal for daily urban commuting on pothole filled streets, weekend rides on rough roads, and long distance tours where comfort matters.